(L-R) Britain's Liam Tancock, Michael Rock, Craig Benson and Adam Brown (not pictured) celebrate placing first in heat 1 of the men's 4x100m medley relay event to qualify for the final, during the London 2012 Olympic Games at the Aquatics Centre August 3, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Swimmers from the Britain men's 4x100m medley relay team celebrate after heat 1 of the event during the London 2012 Olympic Games at the Aquatics Centre August 3, 2012. The British team of Liam Tancock, Michael Rock, Craig Benson and Adam Brown finished their heat in first place to qualify for the final. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Swimmers from the Britain men's 4x100m medley relay team celebrate after heat 1 of the event during the London 2012 Olympic Games at the Aquatics Centre August 3, 2012. The British team of Liam Tancock, Michael Rock, Craig Benson and Adam Brown finished their heat in first place to qualify for the final. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Britain's Liam Tancock reacts after the men's 100m backstroke final during the London 2012 Olympic Games at the Aquatics Centre July 30, 2012. REUTERS/David Gray (BRITAIN - Tags: SPORT OLYMPICS SWIMMING)

Britain's Liam Tancock reacts after taking second place in his men's 100m backstroke semi-final during the London 2012 Olympic Games at the Aquatics Centre July 29, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING)

Britain's Liam Tancock starts heat 5 of the men's 100m backstroke event during the London 2012 Olympic Games at the Aquatics Centre July 29, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING SPORT OLYMPICS)

Britain's Liam Tancock waves after taking second place in heat 6 in the men's 100m backstroke heats during the London 2012 Olympic Games at the Aquatics Centre July 29, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING SPORT OLYMPICS)

Britain's Liam Tancock looks on after placing second in heat 5 of the men's 100m backstroke event during the London 2012 Olympic Games at the Aquatics Centre July 29, 2012. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING)

Liam Tancock (top) of Britain starts on his way to winning the men's 100m backstroke at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Andrew Winning (BRITAIN - Tags: SPORT OLYMPICS) 

Liam Tancock of Britain poses with his medal after winning the Men's 100m Backstroke Final at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS) 

Liam Tancock of Britain passes a poster photograph of himself following the medal ceremony after winning the Men's 100m Backstroke Final at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS) 

Liam Tancock (2nd bottom) of Britain starts on his way to winning the men's 100m backstroke at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Andrew Winning (BRITAIN - Tags: SPORT OLYMPICS) 

Liam Tancock of Britain celebrates winning the men's 100m backstroke at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Andrew Winning (BRITAIN - Tags: SPORT OLYMPICS) 

Liam Tancock of Britain (foreground) starts in the Men's 100m Backstroke Final at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS) 

Liam Tancock of Britain reacts after winning the men's 100m Backstroke Final at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 5, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS) 

Liam Tancock of Britain competes in the men's 50m backstroke qualifying event at the Short Course Swimming World Cup in Berlin October 23, 2011. REUTERS/Tobias Schwarz (GERMANY - Tags: SPORT SWIMMING) 

Gold medallist Liam Tancock of Britain holds a union flag after winning the men's 50m backstroke final during a medal ceremony at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/Bobby Yip (CHINA - Tags: SPORT SWIMMING AQUATICS IMAGE OF THE DAY) 

Gold medallist Liam Tancock (C) of Britain, silver medallist Camille Lacourt of France (L) and bronze medallist Gerhard Zandberg of South Africa show their medals after the men's 50m backstroke final during a medal ceremony at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Gold medallist Liam Tancock of Britain celebrates after winning the men's 50m backstroke final during a medal ceremony at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Gold medallist Britain's Liam Tancock shows off his shoes with his name on them at the medals ceremony for the men's 50m backstroke event at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING IMAGE OF THE DAY AQUATICS) 

Gold medallist Liam Tancock of Britain celebrates after winning the men's 50m backstroke final during a medal ceremony at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain reacts during a medal ceremony after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain stands during a medal ceremony after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain celebrates after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/Issei Kato (CHINA - Tags: SPORT SWIMMING IMAGE OF THE DAY TOP PICTURE AQUATICS) 

Britain's Liam Tancock rests in the pool after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/Carlos Barria (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain celebrates after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain competes during the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock waves to the crowd as he walks away from the pool after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/Christinne Muschi (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock celebrates after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock celebrates after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock gestures after winning the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/Christinne Muschi (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock adjusts his goggles before competing in the men's 50m backstroke final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock (C) starts off his men's 50m backstroke semifinal at the 14th FINA World Championships in Shanghai July 30, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock gestures after competing in the men's 50m backstroke semi-final at the 14th FINA World Championships in Shanghai July 30, 2011. REUTERS/Christinne Muschi (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock gestures after competing in the men's 50m backstroke semifinal at the 14th FINA World Championships in Shanghai July 30, 2011. REUTERS/Bobby Yip (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock starts in the men's 50m backstroke heats at the 14th FINA World Championships in Shanghai July 30, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock competes in the men's 100m backstroke semifinal at the 14th FINA World Championships in Shanghai July 25, 2011. REUTERS/Issei Kato (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain competes during the men's 100m backstroke heats at the 14th FINA World Championships in Shanghai July 25, 2011. REUTERS/Issei Kato (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock competes in the men's 100m backstroke heats at the 14th FINA World Championships in Shanghai July 25, 2011. REUTERS/Carlos Barria (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock rests in the pool with team-mate Chris Walker-Hebborn during a training session at the 14th FINA World Championships in Shanghai July 22, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Britain's Liam Tancock grabs a bottle of water during a training session at the 14th FINA World Championships in Shanghai July 22, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Liam Tancock of Britain swims during a training session
at the 14th FINA World Championships in Shanghai July 22, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS) 

(L-R) England's Liam Tancock, Daniel Sliwinski, Antony James and Simon Andrew Burnett (bottom) react after the men's 4x100m medley relay swimming finals during the Commonwealth Games in New Delhi October 9, 2010. England won the bronze medal. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England celebrates after winning the men's 100m backstroke swimming finals during the Commonwealth Games in New Delhi October 8, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England, Marco Loughran of Wales and Ashley Delaney of Australia compete in the men's 100m backstroke swimming semi-finals during the Commonwealth Games in New Delhi October 7, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England competes in the men's 100m backstroke swimming semi-final during the Commonwealth Games in New Delhi October 7, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England competes in the men's 100m backstroke swimming semi-final during the Commonwealth Games in New Delhi October 7, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

England's Liam Tancock competes in the men's 100m backstroke swimming heats during the Commonwealth Games in New Delhi October 7, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

England's Liam Tancock competes in the men's 100m backstroke swimming heats during the Commonwealth Games in New Delhi October 7, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England celebrates on the podium after winning the gold medal in men's 50m backstroke swimming finals during the Commonwealth Games in New Delhi October 5, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England celebrates on the podium with his gold medal after winning the men's 50m backstroke swimming finals during the Commonwealth Games in New Delhi October 5, 2010. REUTERS/Danish Ismail (INDIA - Tags: SPORT SWIMMING) 

Liam Tancock of England celebrates after winning the gold medal in the men's 50m backstroke swimming finals during the Commonwealth Games in New Delhi October 5, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Britain's Liam Tancock practices his starts during a training camp in Doha September 28, 2010. The team from England is preparing for the 2010 Commonwealth Games in New Delhi. REUTERS/Fadi Al-Assaad (QATAR - Tags: SPORT SWIMMING) 

Britain's Liam Tancock takes part in the England swimming team's training camp at the Aspire Academy in Doha September 28, 2010 as part of preparations for the 2010 Commonwealth Games in New Delhi, India. REUTERS/Fadi Al-Assaad(QATAR - Tags: SPORT SWIMMING) 

Britain's Liam Tancock swims during the England swimming team's training camp at the Aspire Academy in Doha September 28, 2010, as part of preparations for the 2010 Commonwealth Games in New Delhi, India. REUTERS/Fadi Al-Assaad(QATAR - Tags: SPORT SWIMMING) 

Britain's Liam Tancock takes part in the England swimming team's training camp at the Aspire Academy in Doha September 28, 2010 as part of preparations for the 2010 Commonwealth Games in New Delhi, India. REUTERS/Fadi Al-Assaad(QATAR - Tags: SPORT SWIMMING) 

Britain's Liam Tancock swims during the England swimming team's training camp at the Aspire Academy in Doha September 28, 2010, as part of preparations for the 2010 Commonwealth Games in New Delhi, India. REUTERS/Fadi Al-Assaad(QATAR - Tags: SPORT SWIMMING) 

Liam Tancock of Britain presents his silver medal after the men's 50m backstroke final at the European Swimming Championships in Budapest August 12, 2010. REUTERS/Laszlo Balogh (HUNGARY - Tags: SPORT SWIMMING)

Liam Tancock from Britain competes in the men's 50 metres backstroke heats at the European Swimming Championships in Budapest August 11, 2010. REUTERS/Peter Andrews (HUNGARY - Tags: SPORT SWIMMING)

Camille Lacourt from France waves on the podium after the men's 100 metres backstroke final at the European Swimming Championships in Budapest August 10, 2010. Camille Lacourt from France won the competition ahead of compatriot Jeremy Stravius on second place and Liam Tancock from Britain on third place. REUTERS/Peter Andrews (HUNGARY - Tags: SPORT)