Sanctions against oligarchs, an end to 'golden visas', a law against economic crime: the Russian invasion of Ukraine has forced the British government to take a hard look at a system that for decades has allowed Russian money of sometimes dubious origins to flow in. "It's the end of an era," says former MP Dominic Grieve who chaired in 2020 a parliamentary committee that denounced London's complacency over the origin of huge sums of money invested in the country. IMAGES AND SOUNDBITES