Anyone still doubting that London is the money laundering capital of the world should read this Guardian article,
which focuses on a six-month investigation by the BBC Arabic service, and starts like this:
Britain has allowed key members of Egypt's toppled dictatorship to retain millions of pounds of suspected property and business assets in the UK, potentially violating a globally-agreed set of sanctions.
The situation has led to accusations that ministers are more interested in preserving the City of London's cosy relationship with the Arab financial sector than in securing justice.
. . .
"The UK is one of the worst countries when it comes to tracing and freezing Egyptian assets," said [Dr Mohamed Mahsoob, a public investigator who led enquiries into Egypt's "stolen billions" and who has since been appointed to the country's new cabinet].
See also the BBC Newsnight story
, and for Arabic speakers the original investigation here