British police are preparing to mount one of their largest scale operations in recent memory with more than 100,000 protesters set to march through the streets of London on the same day as the FA Cup final in Wembley. The Guardian understands that officers in vast swathes of central London will be granted extra powers in order to police the far-right Unite the Kingdom march organised by Stephen Yaxley Lennon, better known as Tommy Robinson . At the same time, as smaller counter march organised by pro-Palestine protesters will take place, with the two events to be separated by police. The scale of the last UTK march in September stunned both organisers and police with more than 150,000 joining a crowd that occupied Parliament Square in Westminster. The prime minister, Keir Starmer, has said the rise of the far right represented “a fight for the soul of this country” , and the march comes after Nigel Farage’s Reform UK won the biggest share of the vote at last week’s English council elections.…