The Sunday Times Rich List features several names who have dropped down the board since last year's compilation.
The family behind Europe's largest steelmaker - Lakshmi Mittal and his family, who own ArcelorMittal - took a £2.08bn hit in the past year, dropping out of the top 10 to number 11.
Eight years ago the Mittals had a fortune of £27.7bn but now they have just £7.12bn.
Warner Music owner Len Blavatnik came in at number three but dropped two places after a £1.58bn drop in wealth over the past 12 months to £11.59bn.
But top of the pile are David and Simon Reuben, the property tycoon brothers who own London's Millbank Tower and the John Lewis headquarters in the capital. They also own London Oxford Airport and London Heliport.
Simon started out importing carpets and buying real estate and David in metals trading before they moved to property investment.
Their wealth is estimated at £13.1bn, up by £3.4bn from last year.
Brothers Sri and Gopi Hinduja, who run the Hinduja Group, remain in second place a year on with an unchanged fortune of £13bn.
Power couple Ernesto and Kirsty Berterelli come in at number five, with a worth of £9.78bn.
At number six is the Duke of Westminster - worth £9.35bn. His fortune's grounded on 300 acres of land in London's Mayfair and Belgravia - as well as the Chester Grosvenor Hotel.
Just managing to scrape into the top 20 is Sir Richard Branson. Taking the 19th spot, The owner of Virgin Airlines and Fitness Clubs has amassed a fortune of £4.52bn.
New to the list this year is Britain's wealthiest sportsman Lewis Hamilton coming in at 931st place - with an estimated worth of £106m.
And actor and comedian Sacha Baron Cohen, creator of Ali G and Borat Sagdiyev, has a joint fortune of £105m with his actress wife Isla Fisher.
Entrants had to have at least £103m to make it on to the list, a requirement that is up from last year's £100m.