It's worth bearing in mind that London is often referred to as the laundromat of the world for dirty money.
It's also nicknamed Londongrad because of all the oligarchs hiding their stolen billions in luxury houses that sit empty.
People don't realise how corrupt the UK is because the British (let's be honest mainly English) know how to spin, minimise, evade & manipulate like no others. Even the British public has zero clue just how corrupt it is.