Swimming: Tancock strikes gold

Defending champion Liam Tancock has won the gold medal in the 50 metres backstroke at the World Championships in Shanghai.

The 26-year-old was quickest into the final and on Sunday night he touched in 24.50 seconds for victory.
It means the Loughborough ITC swimmer retains the title he won in Rome two years ago and gives Great Britain their second gold medal in the pool following Rebecca Adlington in the 800m freestyle.
Tancock has now won a total of five world medals since he claimed bronze on his senior international debut at the 2005 championships in Montreal.
Tancock then rushed off to prepare for the 4x100m medley relay, where he was swimming the opening backstroke leg.
His title followed Fran Halsall's fourth place in the 50m freestyle.
The 21-year-old had been favourite for the 100m freestyle title before failing to claim a medal.
However, the 'splash and dash' is not her speciality event and the Loughborough ITC swimmer was satisfied with her effort of 24.60secs, 0.11 outside third place in a race won by Therese Alshammar.
Roberto Pavoni was eighth in the 400m individual medley, which saw Ryan Lochte claim yet another medal.
Even reaching the final represented an achievement for the 2009 European champion and augurs well for the 20-year-old, who only made his senior international debut at the European Championships last year, where he finished 12th.
Pavoni finished in 4:19.85, more than three and a half seconds outside his heat swim on Sunday morning.
The longest-standing world record was broken on Sunday night when Sun Yang brought down Grant Hackett's 1,500m freestyle mark.
The Chinese swimmer is trained by Hackett's former coach Dennis Cotterell in Australia and he led from start to finish to touch in 14:34.14, 0.42secs inside the old record set 10 years ago.