Speaking at a London Assembly meeting, Susan Hall asked the mayor if he would “like to say sorry” to businesses across the capital being forced to “lay off staff” because of Chancellor Rachel Reeves’ hike in employers’ national insurance contributions.“I can’t run away from the fact that one of the inheritances of the new Government is a black hole to the tune of £22bn,” said Sir Sadiq Khan. “There’s two ways to fill a black hole.”As he spoke, Ms Hall could be heard murmuring into her microphone: “I’d love to throw him in it.”