Dame Tessa Jowell is to retire after nearly 25 years as an MP.

The Labour stalwart, who served in Cabinet for Tony Blair and Gordon Brown and as culture secretary. played a central role in bringing the 2012 Olympics to London.

Dame Tessa, who stepped down from the front bench last year, said she would not seek re-election to her south London seat in 2015. She told her constituency party it was "the hardest decision I have ever taken" but that it was time to "give somebody else the chance to take the next steps forward".

Mr Blair said that, as well as being an able and determined politician, she was "kind, decent and loyal in a way I have seldom seen in politics".

Lord Coe said she was the "political driving force" behind the Games. Labour leader Ed Miliband said the Olympics would be her "greatest legacy".