The UK has been relatively proactive regarding money laundering. It was actually one of the first countries to mandate a publicly accessible company registry that includes beneficial owners.

Canada is on the other end of the spectrum in terms of both transparency requirements and enforcement, so much so that the term "snow washing" has become part of the vernacular internationally, and even garnered its own Wikipedia entry. There are developing countries (e.g., Ghana) that have more robust anti-money laundering regimes.