Sadiq Khan has gone into hiding over his disastrous Ulez expansion. The race is on, and in less than a hundred days Londoners will have their say in who they want to be their next Mayor. You would have thought Sadiq Khan, who has led this city disastrously for eight long years, would have wanted to face his critics. But no. He’s gone into hiding, on the run from the public, citing a single protest as the reason why he won’t emerge from his lair in City Hall, and face his critics head on. In a move that’s as insulting as it is cowardly, Sadiq Khan has decided to hide away behind the safety of h…