The head of the UK armed forces Admiral Tony Radkin said on Sunday that it was “unlawful and unhelpful” for Britons to go and fight against Russia in Ukraine. His comments contradict British Foreign Secretary Liz Truss, who said she supported anyone who wanted to volunteer and follow an appeal for foreign fighters to come to Ukraine from President Volodymyr Zelensky. “We’ve been very clear that it’s unlawful as well as unhelpful for UK military and for the UK population, to start going towards Ukraine,” Chief of the Defence Staff Radkin told BBC television. “Support from the UK, support in wha…