Boris Johnson paddled away from his plan to move Heathrow to the Thames Estuary this evening, saying that any new airport would only come 'in addition' to those that already exist.
The Mayor also told the BBC that he was examining a range of solutions and that 'Boris Island' was just one option under consideration.
He suggested that he was now considering expanding existing airports instead.
In fact after twenty four hours of ridicule and disbelief, the Mayor appears to have gone cold on Malthouse's dream and looks set to make yet another mid-air u-turn.
During the election campaign Boris told supporters that he would neither back expansion of City Airport nor the construction of a new airport in the Thames Gateway.
But after u-turning on both of these pledges, he now looks set to u-turn once again, and this time with decreasingly amusing results.