For decades, London’s property market has offered sanctuary to fortunes of murky origins, its red-brick mansions and gleaming office blocks standing as monuments to global impunity.Now, as anti-corruption watchdogs from Malaysia to Bangladesh demand justice, Britain is once again forced to reckon with its role as the world’s premier laundromat for kleptocrats.Malaysia’s investigators revealed earlier this month that they were investigating the alleged London-based assets of former prime...