By Mark Trevelyan and Conor Humphries LONDON (Reuters) – An anti-war protester interrupted a live news bulletin on Russia’s state TV Channel One on Monday, holding up a sign behind the studio presenter and shouting slogans denouncing the war in Ukraine. The sign, in English and Russian, read: “NO WAR. Stop the war. Don’t believe propaganda. They are lying to you here.” Another phrase, which looked like “Russians against war”, was partly obscured. The extraordinary act of dissent took place on day 19 of the war which began when Russia invaded Ukraine on Feb. 24 in what it calls a special milita…