£11,700 million - Oil and industry

Closing the gap between the Duke of Westminster by over £4,500 million, Abramovich gained notoriety in Britain thanks to his acquisition of Chelsea football club in 2003 for £278 million.

The Russian made his money in oil but is now investing in gold mining. Placed at No 2 last year as well, his £150 million divorce settlement barely made a dent on his fortune.