Ken Livingstone is heading for re-election as the mayor of London on June 10 according to a new Populus poll for the Times.

The survey suggests that, after the reallocation of second-preference votes, Livingstone could beat Steve Norris, his Tory rival, by 58 to 42 per cent, the same as in 2000.

Nearly half (48 per cent) support the current congestion charge zone with 44 per cent against. But two thirds (67 per cent) oppose its extension, with a quarter supporting enlargement.