Boris Johnson and Ken Livingstone were involved in a furious row in the lift after the London mayoral debate at LBC Radio. Sources say Johnson and Livingstone were "nose to nose" and Johnson 's face was "red with rage".
More top news
An ancient ocean on the surface of Mars held more liquid water than the Earth's Arctic Ocean, scientists believe.
Chelsea fans are at the centre of a new racism storm after video emerged of supporters mocking the recent racist incident on a Paris Metro.
NASA's Dawn probe is preparing to make an historic rendezvous with the dwarf planet Ceres.