Sadiq Khan has been accused of “spineless capitulation” to trade unions by Conservative mayoral candidate Susan Hall. Just minutes before a four-day walkout on the London Underground was set to begin, the London Mayor found more money in the TfL budget to hand over a bumper pay packet to rail workers. It is understood the Mayor of London spent the weekend talking to trade union leaders directly in an attempt to avert the strikes. But in an opinion piece for GB News, Hall dubbed the move “desperate”, saying: “Clearly the embarrassment of facing 140 strikes under his watch, far more than his two…