RESULTS FOR 2009
Ranking: 37=
Worth: £1,100m
Down: £200m
Source of wealth: Supermarkets

The J Sainsbury supermarket group reported earlier this year that it had enjoyed its "best ever Christmas performance". Sainsbury, 68, regained control of his shares in the firm in 2007 after an eight-year period as science minister, when they were held in a blind trust. The family's holding (excluding charitable stakes) has fallen to £800m, but other assets, share sales and £450m dividends in 1999-2005 raise this to £1.1 billion. Sainsbury donated £181m to his Gatsby Charitable Foundation last year.

RESULTS FOR 2008
Ranking: 56=
Worth: £1,300m
Source of wealth: Supermarkets