Perhaps the looters would do better to look closer to home at the onshore tax haven that is Buckingham Palace. This is one incredibly wealthy British based family that avoids taxes and scrutiny with the acquiesance of HM Government. The Windsors live in inner London, public sector housing and claim millions in benefits despite being one of the richest families in the world.
They also hide their huge private investment portfolio in a company called Bank of England Nominees Ltd, which is exempted by statute from normal financial reporting requirements. If Gordon really wants to get serious with billionaire tax dodgers, he should start with Her Majesty.
See also www.Republic.org.uk.