Ukrainian forces are 'decimating' their Russian counterparts as Vladimir Putin's invasion is 'failing under pressure', says one of the UK's top admirals. Speaking to the BBC about whether Russian success in Ukraine was 'inevitable', Sir Tony said: "No. Some of the lead elements of Russian forces have been decimated by the Ukrainian response. However, he said the key call of Kyiv - a no-fly zone - would not help those on the ground. "Most of the shelling is coming from artillery, most of the destruction is coming from artillery, it's not coming from Russian aircraft.