By Charlie Conchie The government’s much touted retail sale of Natwest shares has been derailed by Rishi Sunak’s move to call a snap election, City AM understands. Ministers had been gearing up to offload a chunk of the government’s remaining stake in Natwest to retail investors this summer,in plans confirmed by Jeremy Hunt in his March budget. However, those plans have now been put on ice after the prime minister announced the country would head to the polls in July, Treasury sources confirmed with City A.M. Sky News’ Mark Kleinman first reported the news. The government had been hoping to ig…