"The nuclear war cannot be won and it should never be fought. And we stick strongly to this statement," Moscow's ambassador to the UK, Andrei Kelin, told Sky News. News reporter @samuelosborne93 Please use Chrome browser for a more accessible video player Russia's ambassador to the UK has claimed Britain played a role in an attack on its warships - warning the country is "too deep" in the Ukraine war. In an interview with Sky's Mark Austin, top diplomat Andrei Kelin claimed he had proof that UK special forces were involved in a Ukrainian drone assault on Russia's Black Sea fleet in Crimea and had handed 'evidence' to the British ambassador. Asked to provide evidence of Russia's claims, Mr Kelin said: "We perfectly know about [the] participation of British specialists in [the] training, preparation and execution of violence against the Russian infrastructure and the Russian fleet in the Black Sea. We know that it has been done." Putin 'weakened' after 'catastrophic error' - latest updat