A North American P-51D Mustang "Nooky Booky IV" taxies after a flying display, three days before the opening of the 53rd Paris Air Show at Le Bourget Airport near Paris, France June 14 2019. REUTERS/Pascal Rossignol

A man holds a bookies information board marked with odds, besides the Houses of Parliament, in central London, Britain April 18, 2017. British Prime Minister Theresa May called on Tuesday for an early election on June 8, saying the government had the right plan for negotiating the terms of Britain's exit from the European Union and she needed political unity in London.REUTERS/Stefan Wermuth

A woman carries a bookies chalk board marked with odds, besides the Houses of Parliament, in central London, Britain April 18, 2017. British Prime Minister Theresa May called on Tuesday for an early election on June 8, saying the government had the right plan for negotiating the terms of Britain's exit from the European Union and she needed political unity in London. REUTERS/Peter Nicholls

A woman displays a bookies chalk board marked with odds, besides the Houses of Parliament, in central London, Britain April 18, 2017. British Prime Minister Theresa May called on Tuesday for an early election on June 8, saying the government had the right plan for negotiating the terms of Britain's exit from the European Union and she needed political unity in London. REUTERS/Peter Nicholls

A woman holds a bookies chalk board marked with odds, besides the Houses of Parliament, in central London, Britain April 18, 2017. British Prime Minister Theresa May called on Tuesday for an early election on June 8, saying the government had the right plan for negotiating the terms of Britain's exit from the European Union and she needed political unity in London. REUTERS/Peter Nicholls

Britain Football Soccer - Sunderland v Chelsea - Premier League - The Stadium of Light - 14/12/16 General view of a bookies board displaying bets before the game Action Images via Reuters / Lee Smith Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

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Horse Racing - Cheltenham Festival - Cheltenham Racecourse - 15/3/16
A bookie holds a bundle of cash as she waits for bets ahead of The Stan James Champion Hurdle Challenge Trophy race
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A forensic personnel walks in front of a betting shop after an attack in Sarajevo, November 19, 2015. Two soldiers of the Bosnian army were shot dead late on Wednesday when an attacker opened a fire from an automatic weapon at the betting shop near the army barracks at the periphery of the capital Sarajevo. Witnesses at the scene said the attacker appeared to be a follower of the ultra-conservative Salafi Muslim movement in Bosnia, but Nefic could not confirm the reports. REUTERS/Dado Ruvic

Forensic personnel are seen in front of a betting shop after attack in Sarajevo, November 19, 2015. Two soldiers of the Bosnian army were shot dead late on Wednesday when an attacker opened a fire from an automatic weapon at the betting shop near the army barracks at the periphery of the capital Sarajevo. Witnesses at the scene said the attacker appeared to be a follower of the ultra-conservative Salafi Muslim movement in Bosnia, but Nefic could not confirm the reports. REUTERS/Dado Ruvic

Forensic personnel are seen in front of a betting shop after an attack in Sarajevo, November 19, 2015. Two soldiers of the Bosnian army were shot dead late on Wednesday when an attacker opened a fire from an automatic weapon at the betting shop near the army barracks at the periphery of the capital Sarajevo. Witnesses at the scene said the attacker appeared to be a follower of the ultra-conservative Salafi Muslim movement in Bosnia, but Nefic could not confirm the reports. REUTERS/Dado Ruvic

Bookies, with their faces covered, are taken to a court in a police vehicle in New Delhi May 28, 2013. Three Indian cricketers and 11 bookies were arrested by Delhi Police on May 16 on suspicion of spot-fixing in the Indian Premier League (IPL). REUTERS/Anindito Mukherjee (INDIA - Tags: CRIME LAW SPORT CRICKET)

Indian cricketer Shanthakumaran Sreesanth stands at the police crime branch before being taken to a court in New Delhi May 28, 2013. Sreesanth was arrested on May 16, police said, for receiving 4 million rupees from bookies for underperforming in a match in the multi-billion dollar Indian Premier League (IPL), the sport's richest tournament. He and two other players were provisionally charged with cheating, fraud and breach of trust. REUTERS/Anindito Mukherjee (INDIA - Tags: CRIME LAW SPORT CRICKET)

Indian cricketer Shanthakumaran Sreesanth (R) is taken to a court in a police vehicle in New Delhi May 28, 2013. Sreesanth was arrested on May 16, police said, for receiving 4 million rupees from bookies for underperforming in a match in the multi-billion dollar Indian Premier League (IPL), the sport's richest tournament. He and two other players were provisionally charged with cheating, fraud and breach of trust. REUTERS/Anindito Mukherjee (INDIA - Tags: CRIME LAW SPORT CRICKET)

Indian cricket player Shanthakumaran Sreesanth (C) is pictured through the window of a car as he leaves a court in Delhi May 26, 2013. Sreesanth, who can hurl the ball at speeds of up to 145 km per hour (90 mph) at opposing batsmen, was arrested ten days ago, police said, for receiving 4 million rupees ($71,000) from bookies for underperforming in a match in the multi-billion dollar Indian Premier League (IPL), the sport's richest tournament. He and two other players were provisionally charged with cheating, fraud and breach of trust. REUTERS/Anindito Mukherjee (INDIA - Tags: SPORT CRICKET CRIME LAW)

Indian cricket player Shanthakumaran Sreesanth (C) is pictured through the window of a car as he leaves a court in Delhi May 26, 2013. Sreesanth, who can hurl the ball at speeds of up to 145 km per hour (90 mph) at opposing batsmen, was arrested ten days ago, police said, for receiving 4 million rupees ($71,000) from bookies for underperforming in a match in the multi-billion dollar Indian Premier League (IPL), the sport's richest tournament. He and two other players were provisionally charged with cheating, fraud and breach of trust. REUTERS/Anindito Mukherjee (INDIA - Tags: SPORT CRICKET CRIME LAW TPX IMAGES OF THE DAY)

A cricket fan gets his face painted before the Indian Premier League (IPL) qualifier 2 match outside a stadium in Kolkata May 24, 2013. For decades, cricket was a sleepy, laid-back pastime, but the shorter, television-friendly forms of the sport have brought an influx of money, especially in India. Experts on cricket say the large sums at stake and easy access to cricketers by bookies are clouding the future of the game. Picture taken on May 24, 2013. REUTERS/Rupak De Chowdhuri (INDIA - Tags: CRIME LAW SPORT CRICKET)

A cricket fan shows his Indian Premier League (IPL) qualifier 2 match ticket outside the stadium in Kolkata May 24, 2013. For decades, cricket was a sleepy, laid-back pastime, but the shorter, television-friendly forms of the sport have brought an influx of money, especially in India. Experts on cricket say the large sums at stake and easy access to cricketers by bookies are clouding the future of the game. Picture taken on May 24, 2013. REUTERS/Rupak De Chowdhuri (INDIA - Tags: CRIME LAW SPORT CRICKET)

A bookie adjusts the odds on the colour of the Queen's hat before she arrives to attend the first day of the Royal Ascot, southwest of London June 19, 2012. REUTERS/Andrew Winning (BRITAIN - Tags: ENTERTAINMENT SPORT HORSE RACING SOCIETY ROYALS)

Members of a military wives' choir sing outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing during during a reception with Britain's Prime Minister David Cameron for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing during during a reception with Britain's Prime Minister David Cameron for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir pose for a photograph outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir sing outside number 10 Downing Street before a reception with Britain's Prime Minister David Cameron, for service personnel who have returned from the NATO mission in Libya, London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Members of a military wives' choir listen as Britain's Prime Minister David Cameron speaks during a reception for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Britain's Prime Minister David Cameron meets members of a military wives' choir during a reception for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Britain's Prime Minister David Cameron meets members of a military wives' choir during a reception for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Britain's Prime Minister David Cameron meets members of a military wives' choir during a reception for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Britain's Prime Minister David Cameron meets members of a military wives' choir during a reception for service personnel who have returned from the NATO mission in Libya, at number 10 Downing Street in London December 6, 2011. A song performed by the choir is the bookies favourite to become this year's Christmas number one. REUTERS/Andrew Winning (BRITAIN - Tags: POLITICS MILITARY SOCIETY ENTERTAINMENT)

Two players are seen inside a lottery store, with OPAP games on display, in central Athens May 24, 2011. Greece has pledged to its EU partners to target 50 billion euros ($70 billion) from privatisations and real estate assets, including a 34 percent stake in gaming firm OPAP . REUTERS/Yiorgos Karahalis (GREECE - Tags: POLITICS BUSINESS)

A man sits inside a lottery store at central Athens May 24, 2011. Greece has pledged to its EU partners to target 50 billion euros ($70 billion) from privatisations and real estate assets, including a 34 percent stake in gaming firm OPAP . REUTERS/Yiorgos Karahalis (GREECE - Tags: POLITICS BUSINESS)

A bookmaker is seen holding money during the Cheltenham Festival horse racing meet in Gloucestershire, western England March 15, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT HORSE RACING)

A betting company board with electoral odds placed on it is seen at a polling station near Witney in Oxfordshire, southern England May 6, 2010. Britons began voting on Thursday in what is forecast to be the closest election since 1992, with the opposition Conservatives struggling to convert their opinion poll advantage into an outright majority. The six latest newspaper polls put the Conservatives between six and nine percentage points ahead of Labour, making them the largest party, but denying them outright control.REUTERS/Toby Melville (BRITAIN - Tags: ELECTIONS POLITICS)

Logo of French betting authority on horse races PMU (Paris Mutuel Urbain) in Paris October 7, 2009. REUTERS/Charles Platiau (FRANCE BUSINESS SPORT HORSE RACING)

A man picks numbers for the "SuperEnalotto" state lottery at a betting shop in Milan August 6, 2009. The jackpot for Italy's state lottery increased to a record euro 119 million ($171.2 million) after no-one got the winning, six-number combination in Tuesday's draw. REUTERS/Stefano Rellandini (ITALY SOCIETY)

A man looks at the an advertisement for the state lottery in the window of a betting shop in Milan August 6, 2009. The jackpot for Italy's state lottery increased to a record euro 119 million ($171.2 million) after no-one got the winning, six-number combination in Tuesday's draw. REUTERS/Stefano Rellandini (ITALY SOCIETY)

A bookmaker chalks Labour leadership odds in Westminster, in central London June 5, 2009. Prime Minister Gordon Brown averted the immediate danger of government collapse with a cabinet reshuffle that buys the loyalty of key ministers. REUTERS/Stephen Hird (BRITAIN POLITICS)

A bookie, known as a tick tack man, relays the odds on the third day of the Cheltenham Festival horse racing meeting in Gloucestershire, western England March 12, 2009. REUTERS/Dylan Martinez (BRITAIN SPORT HORSE RACING)

A bookie holds a wad of cash on the third day of the Cheltenham Festival horse racing meeting in Gloucestershire, western England March 12, 2009. REUTERS/Dylan Martinez (BRITAIN SPORT HORSE RACING SOCIETY)

A customer plays roulette at the betting shop Victoria in Madrid October 11, 2008. Besides pawnbrokers, cobblers, betting shops and cheap mobile phone services are doing a good trade as consumers become more thrifty and companies across most of Spain's struggling economy slash jobs and investment. To match feature FINANCIAL/SPAIN-WINNERS REUTERS/Susana Vera (SPAIN)

A customer places a bet on a soccer match at the betting shop Victoria in Madrid October 11, 2008. Besides pawnbrokers, cobblers, betting shops and cheap mobile phone services are doing a good trade as consumers become more thrifty and companies across most of Spain's struggling economy slash jobs and investment. To match feature FINANCIAL/SPAIN-WINNERS REUTERS/Susana Vera (SPAIN)

A woman places a bet before the start of the first race of the Epsom Derby Festival at Epsom Downs in Surrey, southern England June 6, 2008. REUTERS/Darren Staples (BRITAIN)

Booky Oren, president and CEO, Arison Water Initiative, and chairman, WATEC Israel, speaks during the Water: The Global Battle for the World's Most Precious Resource panel at the 2008 Milken Institute Global Conference in Beverly Hills, California April 29, 2008. REUTERS/Phil McCarten (UNITED STATES)

A man reads a newspaper and watches the screens in Spain's first sports betting shop in Madrid, April 17, 2008. The shop opened for business on Wednesday, one of thousands that foreign bookmakers hope to launch in the football-crazy nation which already bets more than any other European country.REUTERS/Andrea Comas (SPAIN)

People stand at the counter in Spain's first sports betting shop in Madrid, April 17, 2008. The shop opened for business on Wednesday, one of thousands that foreign bookmakers hope to launch in the football-crazy nation which already bets more than any other European country.REUTERS/Andrea Comas (SPAIN)

A bookmaker works in front of his board on the first day of the Cheltenham Festival horse racing meeting in Gloucestershire in western England, March 13, 2007 . REUTERS/Toby Melville (BRITAIN)

John McNamara, defence barrister of Australian jockey Chris Munce, leaves the court in Hong Kong March 1, 2007. Munce received his verdict on Thursday after being charged with conspiring for an agent to accept advantages. He was caught in a sting with $32,000 in cash after meeting a suspected illegal bookie last year. REUTERS/Bobby Yip (CHINA)

Prosecutor John Dunn (R) speaks to reporters on the case of Australian jockey Chris Munce in Hong Kong March 1, 2007. Munce received his verdict on Thursday after being charged with conspiring for an agent to accept advantages. He was caught in a sting with $32,000 in cash after meeting a suspected illegal bookie last year. REUTERS/Bobby Yip (CHINA)

Australian jockey Chris Munce walks into a court in Hong Kong March 1, 2007. Munce is expected to receive his verdict on Thursday after being charged with conspiring for an agent to accept advantages. He was caught in a sting with $32,000 in cash after meeting a suspected illegal bookie last year. REUTERS/Paul Yeung (CHINA)

Australian jockey Chris Munce walks into a court in Hong Kong March 1, 2007. Munce is expected to receive his verdict on Thursday after being charged with conspiring for an agent to accept advantages. He was caught in a sting with $32,000 in cash after meeting a suspected illegal bookie last year. REUTERS/Paul Yeung (CHINA)

Australian jockey Chris Munce walks into a court in Hong Kong March 1, 2007. Munce is expected to receive his verdict on Thursday after being charged with conspiring for an agent to accept advantages. He was caught in a sting with $32,000 in cash after meeting a suspected illegal bookie last year. REUTERS/Paul Yeung (CHINA)

Ballot forms for the leadership election for Britain's Conservative Party are sorted in London November 4, 2005 before being sent out to about 254,000 party members. Party members will decide whether to back Shadow Home Secretary David Davis or the bookies' favourite David Cameron as the party looks for its fifth leader in just over eight years. The order in which the candidate's names are listed were "decided by the toss of a coin". REUTERS/Kieran Doherty

Ballot forms for the leadership election for Britain's Conservative Party are sorted in London November 4, 2005 before being sent out to about 254,000 party members. Party members will decide whether to back Shadow Home Secretary David Davis or the bookies' favourite David Cameron as the party looks for its fifth leader in just over eight years. REUTERS/Kieran Doherty

Ballot forms for the leadership election for Britain's Conservative Party are boxed ready for dispatch in London November 4, 2005 before being sent out to about 254,000 party members. Party members will decide whether to back Shadow Home Secretary David Davis or the bookies' favourite David Cameron as the party looks for its fifth leader in just over eight years. REUTERS/Kieran Doherty

Ballot forms for the leadership election for Britain's Conservative Party are sorted in London November 4, 2005 before being sent out to about 254,000 party members. Party members will decide whether to back Shadow Home Secretary David Davis or the bookies' favourite David Cameron as the party looks for its fifth leader in just over eight years. REUTERS/Kieran Doherty

Ballot forms for the leadership election for Britain's Conservative Party are sorted in London November 4, 2005 before being sent out to about 254,000 party members. Party members will decide whether to back Shadow Home Secretary David Davis or the bookies' favourite David Cameron as the party looks for its fifth leader in just over eight years. REUTERS/Kieran Doherty