article_snippet: Microsoft owner Bill Gates: £45.5 billion .
article_snippet: Facebook founder Mark Zuckerberg: £17 billion .
article_snippet: Britain's richest person, landlord Gerald Grosvenor: £7.7 billion .
article_snippet: Chelsea owner Roman Abramovich: £5.4 billion .
article_snippet: Virgin founder Richard Branson: £3 billion .
article_snippet: Film director Steven Spielberg: £2 billion .
article_snippet: American business tycoon Donald Trump: 2.7 million .
article_snippet: Designer Ralph Lauren: £4.2 billion .
article_snippet: Big earner: Virgin founder Richard Branson:
article_snippet: £3 billion was worth £3 billion last year .