Britain's Prime Minister David Cameron (R) is shown the laundry room by prison officers Luke Hooker (L) and Steve Robinson, during his visit to Wormwood Scrubs Prison in west London October 22, 2012. Cameron sought to draw a line under a torrid period for his Conservative Party on Monday, promising a "tough but intelligent" approach to crime that supporters hope will steady the government after a series of blunders. REUTERS/Paul Hackett (BRITAIN - Tags: POLITICS CRIME LAW)

Australia's Steve Hooker competes in the men's pole vault final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Mark Blinch (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Australia's Steve Hooker competes in the men's pole vault final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Mark Blinch (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Australia's Steve Hooker competes in the men's pole vault final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Mark Blinch (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Australia's Steve Hooker competes in the men's pole vault final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Mark Blinch (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

The hand of Australia's Steve Hooker is seen as he competes in the men's pole vault final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Phil Noble (BRITAIN - Tags: SPORT ATHLETICS OLYMPICS)

Australia's Steve Hooker competes in the men's pole vault final during the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Max Rossi (BRITAIN - Tags: SPORT ATHLETICS OLYMPICS)

Australia's Steve Hooker competes in the men's pole vault final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. REUTERS/Phil Noble (BRITAIN - Tags: SPORT ATHLETICS OLYMPICS)

Australia's Steve Hooker prepares to compete in the men's pole vault qualification at the London 2012 Olympic Games at the Olympic Stadium August 8, 2012. REUTERS/Phil Noble (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)

Pole vaulter Steve Hooker of Australia practices during a training session for the IAAF World Championships in Daegu, August 26, 2011. REUTERS/Mark Blinch (SOUTH KOREA - Tags: SPORT ATHLETICS)

Pole vaulter Steve Hooker of Australia practices during a training session for the IAAF World Championships in Daegu, August 26, 2011. REUTERS/Mark Blinch (SOUTH KOREA - Tags: SPORT ATHLETICS)

Steve Hooker of Australia holds his gold medal in the men's pole vault final at the Jawaharlal Nehru Stadium during the Commonwealth Games in New Delhi October 12, 2010. REUTERS/Suzanne Plunkett (INDIA - Tags: SPORT ATHLETICS)

Australia's Steve Hooker clears the bar during the men's pole vault finals at the Commonwealth Games in New Delhi October 11, 2010. Hooker won gold for the event. REUTERS/Adnan Abidi (INDIA - Tags: SPORT ATHLETICS)

Gold medallist Steve Hooker of Australia (R), silver medallist Steven Lewis (L) and bronze medallist Max Eaves, both of England, celebrate after the men's pole vault finals at the Commonwealth Games in New Delhi October 11, 2010. REUTERS/Adnan Abidi (INDIA - Tags: SPORT ATHLETICS)

Australia's Steve Hooker celebrates after winning the gold during the men's pole vault final at the Commonwealth Games in New Delhi October 11, 2010. REUTERS/Adnan Abidi (INDIA - Tags: SPORT ATHLETICS)

Australia's Steve Hooker celebrates his gold medal for the men's pole vault event at the Commonwealth Games in New Delhi October 11, 2010. REUTERS/Adnan Abidi (INDIA - Tags: SPORT ATHLETICS)

Australia's Steve Hooker reacts after successfully clearing the bar during the men's pole vault finals at the Commonwealth Games in New Delhi October 11, 2010. Hooker won gold for the event. REUTERS/Adnan Abidi (INDIA - Tags: SPORT ATHLETICS IMAGES OF THE DAY)

Australia's Steve Hooker competes on his way to winning gold during the men's pole vault finals at the Commonwealth Games in New Delhi October 11, 2010. REUTERS/Adnan Abidi (INDIA - Tags: SPORT ATHLETICS)

Steven Hooker of Australia competes during the men's pole vault event at the IAAF World Indoor Athletics Championships at the Aspire Dome in Doha March 13, 2010. REUTERS/Dominic Ebenbichler (QATAR - Tags: SPORT ATHLETICS IMAGES OF THE DAY)

Australia's Steve Hooker competes in the men's pole vault event during the London Grand Prix athletics tournament at Crystal Palace in London July 25, 2009. REUTERS/Stefan Wermuth (BRITAIN SPORT ATHLETICS IMAGES OF THE DAY)

Beijing Olympics gold medallist Australian Steven Hooker reacts after failing to clear 6.10m in the men's pole vault event during the Sydney Track Classic at Sydney Olympic Park February 28, 2009. REUTERS/Daniel Munoz (AUSTRALIA)

Beijing Olympics gold medallist Australian Steven Hooker fails to clear 6.10m at the men's pole vault during the Sydney Track Classic athletics meeting at Sydney Olympic Park February 28, 2009. REUTERS/Daniel Munoz (AUSTRALIA)

Beijing Olympics gold medallist Steve Hooker jokes with people dressed as kangaroos during the welcome parade for the Australian Olympic team in central Sydney September 15, 2008. REUTERS/Mark Baker/Pool (AUSTRALIA)

Australia's leader of the opposition Brendan Nelson (R) shares a light moment with pole vault gold medallist Steve Hooker (L) as swim team captain Grant Hackett (C) follows during a welcome home ceremony for the Australian Olympic team at Sydney Airport August 26, 2008. REUTERS/Will Burgess (AUSTRALIA)

Pole vaulter Steve Hooker (2nd R) of Australia and hurdler Priscilla Lopes-Schliep (R) of Canada dance during the closing ceremony of the Beijing 2008 Olympic Games at the National Stadium August 24, 2008. Hooker took the men's pole vault gold and Lopes-Schliep took the bronze in the women's 100m hurdles. The stadium is also known as the Bird's Nest. REUTERS/Dylan Martinez (CHINA)

Pole vaulter Steve Hooker (L) of Australia and hurdler Priscilla Lopes-Schliep of Canada dance during the closing ceremony of the Beijing 2008 Olympic Games at the National Stadium August 24, 2008. Hooker took the men's pole vault gold and Lopes-Schliep took the bronze in the women's 100m hurdles. The stadium is also known as the Bird's Nest. REUTERS/Dylan Martinez (CHINA)

Pole vaulter Steve Hooker of Australia dances during the closing ceremony of the Beijing 2008 Olympic Games at the National Stadium August 24, 2008. Hooker took the gold medal in the men's pole vault. The stadium is also known as the Bird's Nest. REUTERS/Dylan Martinez (CHINA)

Men's pole vault medallists (L-R) Evgeny Lukyanenko of Russia (silver), Steve Hooker of Australia (gold) and Denys Yurchenko of Ukraine (bronze) pose on podium during the medals ceremony of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 23, 2008. REUTERS/Mike Blake (CHINA)

Men's pole vault gold medallist Steve Hooker of Australia poses on podium during the medals ceremony of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 23, 2008. REUTERS/Mike Blake (CHINA)

Men's pole vault gold medallist Steve Hooker of Australia poses on podium during the medals ceremony of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 23, 2008. REUTERS/Mike Blake (CHINA)

Men's pole vault gold medallist Steve Hooker of Australia poses on podium during the medals ceremony of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 23, 2008. REUTERS/Mike Blake (CHINA)

Men's pole vault gold medallist Steve Hooker of Australia poses on podium during the medals ceremony of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 23, 2008. REUTERS/Mike Blake (CHINA)

Men's pole vault gold medallist Steve Hooker of Australia poses on podium during the medals ceremony of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 23, 2008. REUTERS/Carlos Barria (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kim Kyung-Hoon (CHINA)

Steve Hooker of Australia (L) rests during the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kim Kyung-Hoon (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kim Kyung-Hoon (CHINA)

Steve Hooker of Australia celebrates, with his coach, winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kim Kyung-Hoon (CHINA)

Steve Hooker of Australia jumps 5.96m during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Stefano Rellandini (CHINA)

Steve Hooker of Australia changes after winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kai Pfaffenbach (CHINA)

Steve Hooker of Australia jumps 5.96m during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Ruben Sprich (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kai Pfaffenbach (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kai Pfaffenbach (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kai Pfaffenbach (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Kai Pfaffenbach (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Dylan Martinez (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Dylan Martinez (CHINA)

Steve Hooker of Australia jumps 5.96m during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Dylan Martinez (CHINA)

Steve Hooker of Australia jumps 5.96m during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Dylan Martinez (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Ruben Sprich (CHINA)

Steve Hooker of Australia competes during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Ruben Sprich (CHINA)

Steve Hooker of Australia jumps 5.96m during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Mike Blake (CHINA)

Steve Hooker of Australia competes during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Mike Blake (CHINA)

Steve Hooker of Australia competes during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Stefano Rellandini (CHINA)

Steve Hooker of Australia competes during his men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Wolfgang Rattay (CHINA)

Steve Hooker of Australia holds his national flag after winning the men's pole vault final in the athletics competition at the National Stadium during the Beijing 2008 Olympic Games, August 22, 2008. REUTERS/Kai Pfaffenbach (CHINA)

Australian supporters cheer Steve Hooker of Australia after he jumped 5.96m in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Jerry Lampen (CHINA)

Steve Hooker of Australia celebrates after jumping 5.96m and winning the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/David Gray (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Dylan Martinez (CHINA)

Steve Hooker of Australia celebrates winning the gold medal in the men's pole vault final of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Dylan Martinez (CHINA)