By Vladimir Soldatkin MOSCOW (Reuters) – Russia’s foreign minister accused his British counterpart on Thursday of grandstanding and refusing to listen, at a rancorous encounter that highlighted the gulf between them over the Ukraine crisis. “I’m honestly disappointed that what we have is a conversation between a dumb and a deaf person…Our most detailed explanations fell on unprepared soil,” Sergei Lavrov told a joint news conference with Britain’s Liz Truss. “They say Russia is waiting until the ground freezes like a stone so its tanks can easily cross into Ukrainian territory. I think the g…