By William James LONDON (Reuters) -Britain announced sanctions on 14 more Russian entities and people on Thursday, including state media organisations behind RT and Sputnik and some senior figures, saying it was targeting those who push out President Vladimir Putin’s “fake news and narratives”. Britain is acting in concert with its Western allies to try to cripple Russia’s economy as punishment for its invasion of Ukraine, and has already sanctioned more than 1,000 individuals and businesses. Among those sanctioned on Thursday were RT’s managing director, Alexey Nikolov, Sergey Brilev, a promi…