The Westminster whistleblower: how my friend Sergei tried to expose the Kremlin plot against Britain

Russian-born UK citizen and Tory party activist Sergei Cristo fought to make MI5 sit up and take notice of the Russian political interference operation now threatening democracy in Britain – and around the world

In the dark days of the spring in 2022, as Russian troops terrorised Bucha and every day brought shocking new scenes of Ukrainians fleeing for their lives, I rang an old acquaintance, Sergei Cristo. Cristo is a Russian-born British citizen and I prepared for what I suspected might be a long conversation: he is a talker. He was born in Rostov-on-Don in southern Russia, but he moved to Britain when he was 19 and it’s fair to say we’re not the most obvious of allies. He loves the royal family and is a passionate Conservative party activist. He used to be on the committee of a donor club for young Conservatives, “and then I became vice-chairman, I knew the cabinet, I knew the leader, everybody”.

He’s not kidding. He has photos of himself with everyone from Margaret Thatcher to Boris Johnson, and his favourite place to hang out used to be the Carlton Club, the grand Conservative private members’ club in central London.