RESULTS FOR 2009
Ranking: 5
Worth: £4,000m
Down: £1.4bn
Source of wealth: Packaging

Rausing, 83, the reclusive Swedish industrialist, is one of Britain's most generous donors. He and his family committed more than £150m last year to charity and still had £148,000 left over to give to the Conservative party. Based in East Sussex, Rausing helped to develop the Tetra Pak (later Tetra Laval) firm, which revolutionised the packaging of milk. He moved to Britain in the early 1980s to escape Sweden's punitive tax regime and sold his 50% stake in Tetra Pak to his late brother, Gad, for £4.4 billion in 1995. With hefty investments but falling asset values, we cut the family's wealth by 26%.

RESULTS FOR 2008
Ranking: 7
Worth: £5,400m
Source of wealth: Packaging