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Showing posts with label nerve. Show all posts
Showing posts with label nerve. Show all posts

Wednesday, 26 October 2016

How do batsmen cope with the intensity of their lonely skill?

Digging the pitch, repetitive body movements, talking to themselves, superstitious behaviour, visualisation - different ways that batsmen deal with the pressure of their profession


Michael Bond in Cricinfo


All sportspeople like to imagine that their discipline is the most mentally challenging, that winning or losing comes from within. But batsmen have a stronger claim than most. What other sport demands such intense concentration, affords participants so little control over their situation and penalises mistakes so cruelly and with such dramatic ritual?

Batting is a game of life and death like no other. Success - a century, a match-saving last stand - can live with you forever. But getting out feels like the end of everything: you are dismissed not just from the field of play, but from your own dreams of hopefulness and redemption.


---Also read

THE MASKS WE WEAR

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Dismissed batsmen are like mourners at their own funerals. The dressing room falls silent as they return, "in respect for the dead", as Mike Brearley puts it in The Art of Captaincy (1985).

"There aren't many situations in sport where you have this challenge of one tiny mistake and that's it, finished, the rest of the day you're watching from the sidelines," says sports psychologist Steve Bull, who worked with the England cricket team for 17 years. "It creates a particular type of pressure which I don't think other athletes experience."

Given the intensity of the mental drama, it is little wonder that a batsman's struggles are with himself as much as with the bowler he faces, and that a lack of confidence can invite negative thinking and a fear of failure. For top-level batsmen with near-perfect technical skills, protecting themselves from such tendencies is critical. The methods they use to reduce anxiety, stay positive and maintain focus are idiosyncratic, often eccentric and tell us as much about the quirks of the human mind as the nuances of cricket.

If you watched England's three-match Test series against Sri Lanka this summer, you will have spotted a graphic example of one of these methods. Before each ball, the Sri Lankan opener Kaushal Silva performs what psychologists call a "pre-performance routine". He adjusts the velcro on his gloves, moves his bat from his left to his right hand and holds it up in front of him, moves his left elbow back and forth eight times (fewer if he's facing a spinner) as if pulling on an imaginary rope, then, gripping his bat with both hands, arches his back before settling into his crease.

The repetition looks neurotic, but Silva has developed it to help him feel settled. "I don't really count the exact number of times I do it, it just comes from my body," he says. "I do it until I have calmed my nerves and I feel OK and I'm really focused. These small things help me to be myself and to just concentrate on the next ball."

It seems to be working. Sri Lanka lost 0-2, but Silva won his team's Player-of-the-Series award for his 193 runs.

Most batsmen have pre-performance routines, though few as elaborate as Silva's. They might wander a few steps towards square leg, tap the bat on the ground a particular way or pull at their shirt. What psychological purpose does this serve? Brearley thinks it's "a way of clearing the mind of the last ball, getting on with the next one, making clear to oneself that a line needs to be drawn under the last one".

In Jonathan Trott's case this is literally true. He marks his guard with a shallow trench, which he reinforces before each delivery, as if to bury everything that's gone before, a habit he repeats whether he's batting in the nets or in a county or international game.

Such repetition is critical to why routines work, says Bull. "It has to be 100% consistent, every ball always the same. You need to get your routines habitualised to the point where you don't think about them, to practise them so that when you're in the middle you go into automatic pilot."

In other words, batsmen should tune their mental routines alongside their physical ones so that the two coalesce. Consider Kevin Pietersen's advice to a 12-year-old budding cricketer who asked him on Twitter how to stop "second-guessing" himself when playing a shot, a common mental error among cricketers still developing their technique. "Practise, practise, practise, and trust your practise," Pietersen replied. "Hardest thing to do but when you do it changes your game."

Perhaps the most tangible function of routines is that they give the batsman a sense of control over a situation which, for the most part, is out of their hands. The state of the wicket, the weather, the path of the ball through the air and off the pitch are beyond his reckoning; his pre-ball ritual is all his own. This need for control amid so much uncertainty may explain why batsmen are particularly prone to superstitions. Unlike a pre-performance routine, a superstition - essentially an irrational belief in implausible causality - is unlikely to improve performance. Yet cricket is full of them.

The Glamorgan opener Steve James avoided eating duck meat until he retired, and he wouldn't allow his daughter to have plastic ducks in her bath. Mike Atherton had to be first on to the field at the start of an innings, even if it meant barging past his opening partner on the way down the pavilion steps. The South African batsman Neil McKenzie used to tape his bat to the dressing-room ceiling because his team-mates had once done this as a practical joke prior to him scoring a century. Steve Waugh batted with a red rag in his pocket for similar reasons.

Derek Randall, like many batsmen, hated being on 13. "I couldn't wait to get off it," he says. "Sometimes I'd get out because I was trying too hard to get off the blooming thing."

Ed Smith, one of the most notoriously superstitious cricketers, had a habit of asking the umpire, mid-over, how many balls were left. For the first part of his career he did this always after the fourth ball, then switched to asking after the third ball. Since he batted for around 15,000 overs in his career, he must have asked this question of the umpire around 15,000 times.

"It was silly and I knew it," he writes in Luck: A Fresh Look at Fortune (2012). "It was unintelligent and I knew it. It was a source of mirth and I knew it. But I did it anyway. Superstition was a dependency I found hard to give up."

Many batsmens' superstitions revolve around an obsession with their kit. Trott is scrupulous about how he arranges his bats. Atherton always followed the same padding-up routine: box, chest guard, inside thigh-pad, outside thigh-pad, left pad, right pad, arm guard, gloves, helmet. This kind of fastidiousness is not too surprising since batting is much about organisation, repetition and structure.

Yet rigorously adhering to a ritual is unlikely to put you in the runs and could make things worse. "If the superstition is something you might not have control over, like wearing your lucky socks, what happens when you lose your lucky socks or they fall apart," says sports psychologist Stewart Cotterill. "It will have the opposite effect: you'll feel you're not ready."

Once all the fussing and the rituals and the routines are done and the batsman is settled at the crease, he can then focus on the bowling. This is where the real test begins. Unless you are an expert meditator, paying close sustained attention to something for long periods can be mentally draining. To deal with this, coaches encourage batsmen to "dial up" their focus when the bowler is running in and "dial down" between balls.

Atherton says switching on and off like this is "absolutely vital" and came easily to him, a naturally relaxed character. "All studies show you can't concentrate for lengthy periods without a break. The ball is 'live' for maybe six to ten seconds, so that is all you have to concentrate for."

Silva pares down the window of concentration even further, to three or four seconds, switching on only when the bowler is halfway through his run-up. He calculates that this way, if he sets out to score a century in, say, 180 to 200 balls, he will have to concentrate deeply for just ten to 15 minutes. "So it's 15 minutes to get 100 runs. If you cut it down like this then it will be easier. You don't worry about the long term, you just focus on the particular ball."

"Mental skills are like physical skills. You have to work at them relentlessly. You have to challenge your brain to get better at blocking out the negatives and replacing them with positives"

STEVE BULL, SPORTS PSYCHOLOGIST


The thought of surviving hours at the crease can seem overwhelming if you don't break it down.

Tammy Beaumont, who this summer became the first woman to hit back-to-back ODI centuriesfor England, during the series against Pakistan, worries only about the next five runs. "I'll tell myself: get to five, once I get to five get to ten, keep it like that, keep it all about the next ball."

Another approach is to segment time. Brearley and Randall did this during the Centenary Testbetween England and Australia in Melbourne in 1977. Needing 463 to win with a wicket down, they decided to take it in 15-minute sections. "Stick at it, Skip. In ten minutes there'll only be 15 minutes to tea," Brearley recalls Randall saying, in The Art of Captaincy. They lost by 45 runs; Randall scored 174.

You don't have to be an international or even a professional cricketer to benefit from these mental heuristics. Bull says the key difference between elite and "Sunday afternoon batsmen" is that "Sunday afternoon batsmen tend to overcomplicate things. They're standing there tapping the ground as the bowler runs in, thinking about where the fields are, thinking about their left-hand grip, where their shoulders are. The best players in the world are just standing there saying: watch the ball."

Mental routines are a way to simplify things, to shut out technical thoughts, memories of mistimed shots and other internal distractions, and to help the batsman settle into a state of readiness that Bull calls "relaxed alertness". But routines alone may not be enough, especially in international games where the pressures can be immense. To settle nerves and maintain confidence through an innings, many batsmen engage in what used to be considered a symptom of mental illness but is now recognised as fully functional: talking to yourself.

In a 2013 study at an English first-class cricket club, psychologists at Cardiff Metropolitan University found that batsmen used self-talk regularly, either to motivate themselves in challenging situations - when walking out to bat, for example, or after a poor shot - or to deliver instructional cues that focus attention, such as "Watch the ball!"

In fact, "Watch the ball" seems to be the default cue for most batsmen. Ricky Ponting used it. You can sometimes see Eoin Morgan mouthing it before a ball. Beaumont, after watching one of Ponting's masterclasses, adopted it then adapted it - her current cue is "Time the ball, play straight". Easy if you know how.

One of the most notorious self-talkers in cricket history is Randall. He did it constantly and out loud. "It was spontaneous, it was a natural thing to do. When I'm nervous I start talking. It would help me concentrate. It annoyed everybody, including the people who played with me."

During the fourth Test of the 1978-79 Ashes, when Randall scored 150 during the second innings and turned the series in England's favour, his monologue continued throughout the nine hours and 42 minutes he spent at the crease. Here's a snatch of it, as related to Sunday Times journalist Dudley Doust by his opponents and team-mates: "Come on, Rags," he says. "Get stuck in. Don't take any chances. Get forward, get forward. Get behind the ball. Take your time, slow and easy. You idiot, Rags. Come on, come. Come on, England."

Younis Khan, who averages 53.72 in Test cricket and is Pakistan's highest-ever run scorer, also talks to himself all the time when he's at the wicket. But he has a slightly different approach to most, conducting his conversations with an alter ego that he conjures up as he goes out to bat.

"I imagine there is a guy standing in front of me and he is Younis Khan, and just talk with him. It's like there are two Younis Khans standing face to face like a boxer, and they are talking and looking each other in the eyes. Come on, Younis Khan, you can do this, you can do that."

Self-talk can keep you focused, and it can also help maintain confidence, without which batting can feel like Russian roulette. Mark Ramprakash, the England men's batting coach, says confidence and self-belief are "absolutely paramount. They can work wonders: they can make up for a less-than-perfect technique. The thing with cricket is that you have a lot of bad days. You make one wrong decision, or someone takes a great catch. The best players, like Alastair Cook, are incredibly resilient to those bad days. They maintain a belief in their own ability."

Ramprakash himself suffered a crisis of belief early on in his England career when he failed to make a big score and began to question whether he belonged at Test level. Then in 1998 he started working with Bull, brought in by England as team psychologist.

"He gave me a very simple framework of coping with all the scrambled thoughts that were going on in my head," says Ramprakash.

Silva pares down the window of concentration to three or four seconds, switching on only when the bowler is halfway through his run-up. "So it's 15 minutes to get 100 runs. If you cut it down like this then it will be easier"

It proved pivotal. Soon after meeting Bull he scored 154 against West Indies in Barbados - his first Test century - and then topped the averages the following winter in Australia. His team-mate Atherton, writing in his autobiography, said he sensed at the time that Ramprakash was "a totally different person, and consequently, player".

Today the mental side of batting and the pressures that come with playing at international level are taken very seriously by England's management, due in no small part to Ramprakash's influence. Yet confidence is a fickle trait. Sometimes it's necessary to fake it to make it, so to speak. Psychologists have known for decades that feelings and emotions stem from changes in the body, rather than the other way round - a phenomenon known as embodied cognition - which means it's possible to generate confidence simply by acting it out.

"Shadow batting" - practising sublime strokes between balls - or walking out to bat with head held high, can have a positive effect on the way you play. The sports psychologist Jamie Barker, who works with Nottinghamshire Cricket Club and the ECB's performance programme, makes a point of getting players to focus on their body language as they leave the pavilion, to appear confident even if they don't feel it: "If you're assertive, your brain will pick up on that."

Another way of "faking" confidence is to visualise the way you want to play in your mind's eye before the game begins.
In 1974, early in his career, Randall suffered four first-class innings in a row without scoring a run. "It was a nightmare," he says. "The pressure just builds on you." So on the morning of his fifth innings he got up early and arrived at the ground while it was still deserted, strapped on his pads, walked out to the middle, played a cover drive and took a run, "just to remember what it was like". He scored 93 that day.

Ramprakash encourages England's batsmen to use this kind of visualisation, which serves as a cognitive rehearsal for the main event. There is much evidence that it works. One problem with all these approaches is that worrying too much about your own performance can easily make things worse. Steven Sylvester, Middlesex's psychologist and author of the recent book Detox Your Ego(2016), thinks that for players at the top of their game what really matters is "where your heart is, why am I here?"

The important thing, he says, is to believe at an emotional level that you are playing not for yourself but for your team or your country, or some other ideal that transcends you. "When players start to think about their performance as serving the group it increases their self-esteem, their belief goes up and they become a bit freer in their skills. It gives them a little bit extra."

In 2013, Sylvester helped Australia and Middlesex batsman Chris Rogers after he was called up to the Ashes squad more than five years after his previous Test. "It became blindingly obvious that his fear of representing his country in the Ashes as an opening batsman was stopping him from moving forward," he says. "Through a deep discussion of how to serve his country he came up with a more compelling reason to doing well than if it was just about him."

Sylvester coached Moeen Ali through a similar process, helping him put his cricket in the context of his faith and his desire to be a role model. The Pakistan batsman Asad Shafiq, who has scored eight Test centuries at No. 6 - a world record - gives an equally compelling reason for his own success: "To bat at No. 6 you have to be patient, as most of the time the tailenders are with you. You have to give them confidence and support."

Shafiq is batting not just for himself, but for Nos. 7, 8, 9, 10 and 11 as well. He epitomises CLR James' portrait in his classic Beyond a Boundary (1963) of the batsman as the ultimate team player. When facing the ball, writes James, he "does not merely represent his side. For that moment, to all intents and purposes, he is his side."

Without doubt, all batsmen can improve their confidence, resilience and other mental attributes if they're willing to practise. "Mental skills are like physical skills," says Bull. "You have to work at them relentlessly. You have to challenge your brain to get better at blocking out the negatives and replacing them with positives."

Yet it also seems clear that some people are inherently better at this than others. In 2005, Bull carried out a psychological analysis of 12 English cricketers from the previous two decades whom county coaches had identified as the toughest mentally in the country. Among them were Atherton, Graham Gooch and Alec Stewart. Bull found them all to be highly competitive and motivated, full of self-confidence and with a never-say-die attitude, some of which derived from their upbringing, some from the teams they had played with and some from their personality.

For the rest of us, it is comforting to know that we can learn such skills - and that even the greats can struggle at times. Even Don Bradman called batting "a nerve-racking business". In The Art of Cricket (1958), he implores us to give a thought to the batsman's travails as he wends his way to the wicket: "He is human like you, and desperately anxious to do well."

Saturday, 12 January 2013

Lead Poisoning - The Grime Behind The Crime?

Could an astonishing explanation for the rise and fall of violent crime be correct? 
 It seemed, at first, preposterous. The hypothesis was so exotic that I laughed. The rise and fall of violent crime during the second half of the 20th century and first years of the 21st were caused, it proposed, not by changes in policing or imprisonment, single parenthood, recession, crack cocaine or the legalisation of abortion, but mainly by … lead.

I don’t mean bullets. The crime waves that afflicted many parts of the world and then, against all predictions, collapsed, were ascribed, in an article published by Mother Jones last week, to the rise and fall in the use of lead-based paint and leaded petrol (1).

It’s ridiculous – until you see the evidence. Studies between cities, states and nations show that the rise and fall in crime follows, with a roughly 20-year lag, the rise and fall in the exposure of infants to trace quantities of lead (2,3,4). But all that gives us is correlation: an association that could be coincidental. The Mother Jones article, based on several scientific papers, claimed causation.

I began by reading the papers. Do they say what the article claims? They do. Then I looked up the citations: the discussion of those papers in the scientific literature. The three whose citations I checked have been mentioned, between them, 301 times (5). I went through all these papers (except the handful in foreign languages), as well as dozens of others. To my astonishment, I could find just one study attacking the thesis (6), and this was sponsored by the Ethyl Corporation, which happens to have been a major manufacturer of the petrol additive tetraethyl lead. I found many more supporting it. Crazy as this seems, it really does look as if lead poisoning could be the major cause of the rise and fall of violent crime.

The curve is much the same in all the countries these papers have studied. Lead was withdrawn first from paint and then from petrol at different times in different places (beginning in the 1970s in the US in the case of petrol and the 1990s in many parts of Europe), yet, despite these different times and different circumstances, the pattern is the same: violent crime peaks around 20 years after lead pollution peaks (7,8,9). The crime rates in big and small cities in the US, once wildly different, have now converged, also some 20 years after the phase-out (10).




Nothing else seems to explain these trends. The researchers have taken great pains to correct for the obvious complicating variables: social, economic and legal factors. One paper found, after 15 variables had been taken into account, a four-fold increase in homicides in US counties with the highest lead pollution (11). Another discovered that lead levels appeared to explain 90% of the difference in rates of aggravated assault between US cities (12).

A study in Cincinnati finds that young people prosecuted for delinquency are four times more likely than the general population to have high levels of lead in their bones (13). A meta-analysis (a study of studies) of 19 papers found no evidence that other factors could explain the correlation between exposure to lead and conduct problems among young people (14).

Is it really so surprising that a highly potent nerve toxin causes behavioural change? The devastating and permanent impacts of even very low levels of lead on IQ have been known for many decades. Behavioural effects were first documented in 1943: infants who had tragically chewed the leaded paint off the railings of their cots were found, years after they had recovered from acute poisoning, to be highly disposed to aggression and violence (15).

Lead poisoning in infancy, even at very low levels, impairs the development of those parts of the brain (the anterior cingulate cortex and prefrontal cortex) which regulate behaviour and mood (16). The effect is stronger in boys than in girls. Lead poisoning is associated with attention deficit disorder (17,18), impulsiveness, aggression and, according to one paper, psychopathy (19). Lead is so toxic that it is unsafe at any level (21, 22).

Because they were more likely to live in inner cities, in unrenovated housing whose lead paint was peeling and beside busy roads, African Americans have been subjected to higher average levels of lead poisoning than white Americans. One study, published in 1986, found that 18% of white children but 52% of black children in the US had over 20 milligrammes per decilitre of lead in their blood (23); another that, between 1976 and 1980, black infants were eight times more likely to be carrying the horrendous load of 40mg/dl (24). This, two papers propose, could explain much of the difference in crime rates between black and white Americans (25), and the supposed difference in IQ trumpeted by the book The Bell Curve (26).

There is only one remaining manufacturer of tetraethyl lead on earth. It’s based in Ellesmere Port in Britain, and it’s called Innospec. The product has long been banned from general sale in the UK, but the company admits on its website that it’s still selling this poison to other countries ( 27). Innospec refuses to talk to me, but other reports claim that tetraethyl lead is being exported to Afghanistan, Algeria, Burma, Iraq, North Korea, Sierra Leone and Yemen (28,29), countries afflicted either by chaos or by governments who don’t give a damn about their people.

In 2010 the company admitted that, under the name Associated Octel, it had paid millions of dollars in bribes to officials in Iraq and Indonesia to be allowed to continue, at immense profit, selling tetratethyl lead (30). Through an agreement with the British and US courts, Innospec was let off so lightly that Lord Justice Thomas complained that “no such arrangement should be made again.” (31) God knows how many lives this firm has ruined.

The UK government tells me that because tetraethyl lead is not on the European list of controlled exports, there is nothing to prevent Innospec from selling to whoever it wants (32). There’s a term for this: environmental racism.

If it is true that lead pollution, whose wider impacts have been recognised for decades, has driven the rise and fall of violence, then there lies, behind the crimes that have destroyed so many lives and filled so many prisons, a much greater crime.

First published in the Guardian. Courtesy: www.monbiot.com
References:
1. http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline
2. Rick Nevin, May 2000. How Lead Exposure Relates to Temporal Changes in IQ, Violent Crime, and Unwed Pregnancy. Environmental Research, Vol.83, Issue 1, pp1–22. http://dx.doi.org/10.1006/enrs.1999.4045
3. Rick Nevin, 2007. Understanding international crime trends: the legacy of preschool lead exposure. Environmental Research Vol. 104, pp315–336.
doi:10.1016/j.envres.2007.02.008
4. Jessica Wolpaw Reyes, May 2007. Environmental Policy as Social Policy? The Impact of Childhood Lead Exposure on Crime. National Bureau of Economic Research Working Paper 13097. http://www.nber.org/papers/w13097
5. The three papers whose citations I checked were Rick Nevin, May 2000, as above;
Rick Nevin, 2007, as above and Jessica Wolpaw Reyes, May 2007, as above.
6. Patricia L. McCalla and Kenneth C. Land, 2004. Trends in environmental lead exposure and troubled youth, 1960–1995: an age-period-cohort-characteristic analysis. Social Science Research Vol.33, pp339–359.
7. PB Stretesky and MJ Lynch, May 2001. The relationship between lead exposure and homicide. Archives of Pediatrics and Adolescent Medicine, vol.155, no.5, pp579-82.
8. Paul B. Stretesky and Michael J. Lynch, June 2004. The Relationship between Lead and Crime.Journal of Health and Social Behavior, Vol.45, no.2, pp214-229. doi: 10.1177/002214650404500207
9. Howard W. Mielke and Sammy Zahran, 2012. The urban rise and fall of air lead (Pb) and the latent surge and retreat of societal violence. Environment International Vol. 43, pp 48–55. doi:10.1016/j.envint.2012.03.005
10. Bureau of Justice, no date given. Homicide Trends in the U.S. http://bjs.ojp.usdoj.gov/content/homicide/city.cfm
11. PB Stretesky and MJ Lynch, May 2001, as above.
12. Howard W. Mielke and Sammy Zahran, 2012, as above.
13. Herbert L. Needleman et al, 2002. Bone lead levels in adjudicated delinquents: a case control study. Neurotoxicology and Teratology, Vol. 24, pp711 –717.
14. David K. Marcus, Jessica J. Fulton and Erin J. Clarke, 2010. Lead and Conduct Problems: a Meta-Analysis. Journal of Clinical Child and Adolescent Psychology, vol.39, no.2, pp234-241. http://dx.doi.org/10.1080/15374411003591455
15. R.K. Byers and E.E. Lord, 1943. Late effects of lead poisoning on mental development, American Journal of Diseases of Children, Vol. 66, pp. 471– 483.
16. Kim M Cecil et al, 2008. Decreased Brain Volume in Adults with Childhood Lead Exposure. Decreased Brain Volume in Adults with Childhood Lead Exposure. PLoS Medicine, vol. 5, no. 5. doi:10.1371/journal.pmed.0050112
17. Joel T. Nigg et al, January 2010. Confirmation and Extension of Association of Blood Lead with Attention-Deficit/Hyperactivity Disorder (ADHD) and ADHD
Symptom Domains at Population-Typical Exposure Levels. J Child Psychol Psychiatry. Vol. 51, no.1, pp.58–65. doi:10.1111/j.1469-7610.2009.02135.x.
18. Joe M. Braun et al, 2006. Exposures to Environmental Toxicants and Attention Deficit Hyperactivity Disorder in U.S. Children. Environmental Health Perspectives vol. 114, pp.1904–1909. doi:10.1289/ehp.9478
19. John Paul Wright, Danielle Boisvert and Jamie Vaske. July 2009. Blood Lead Levels in Early Childhood Predict Adulthood Psychopathy. Youth Violence and Juvenile Justice, vol.7, no.3, pp.208-222. doi: 10.1177/1541204009333827
20. Rick Nevin, 2007, as above, reports that “there is no lower blood lead threshold for IQ losses”.
21. David Bellinger concludes that “No level of lead exposure appears to be ‘safe’ and even the current ‘low’ levels of exposure in children are associated with neurodevelopmental deficits.”. April 2008. Very low lead exposures and children’s neurodevelopment. Current Opinion in Pediatrics, Vol.20, no.2, pp172-177. doi: 10.1097/MOP.0b013e3282f4f97b
23. Royal Society of Canada, 1986. Lead in the Canadian Environment. Science and Regulation. Cited by Rick Nevin, 2007, as above.
24. Agency for Toxic Substances and Disease Registry, 1988. The Nature and Extent of Lead Poisoning in Children in the United States. US Department of Health and Human Services. Cited by Rick Nevin, 2007, as above.
25. Rick Nevin, 2007, as above.
26. Rick Nevin, February 2012. Lead Poisoning and The Bell Curve. Munich Personal RePEc Archive MPRA Paper No. 36569. http://mpra.ub.uni-muenchen.de/36569/
27. http://www.innospecinc.com/octane-additives.html
28. http://www.economist.com/news/21566385-lead-tantalisingly-close-death-2013-world-meant-stop-using-leaded-petrol-toxin
29. Anne Roberts and Elizabeth O’Brien, 2011. Supply Chain for the Lead in Leaded Petrol. LEAD Action News, vol.11, no.4.
30. http://www.guardian.co.uk/uk/2010/mar/18/firm-bribes-banned-chemical-tetraethyl
31. http://www.guardian.co.uk/business/2010/jun/30/octel-petrol-iraq-lead
32. I was passed by Defra to the Department for Transport, then by the DfT to the Department for Business, which told me it was all down to the European list. It was clear that none of them were remotely interested in the issue, or had considered it before.