Two Oxfordshire billionaires feature amongst the biggest risers and fallers in this year's list of Britain's richest people.

Sir Anthony Bamford and family, who live at Daylesford, near Chipping Norton, where Lady Bamford's farm shop now sells luxury clothes and household goods, boast a fortune of £1,950m (£2bn) - up £650m on the 2007 list.

The Bamfords' fortune, listed at 34 (up from 43) stems from money made by Sir Anthony's late father, Joe, who founded the JCB digger group in 1945 (named after his initials).

Sir Anthony also appears at number 18 in the list of Britain top political donors, having given the Conservatives £161,589.

But Sir Richard Branson, who has a home in Kidlington, is one of the biggest fallers in the Sunday Times list of Britain's richest 1,000 people.

Sir Richard comes in at number 20, down from 11 last year, with wealth estimated at £2,7bn, £400m less than in 2007 - when he fell out of the top 10.

Hotelier and former chairman of Oxford United Firoz Kassam, who owns Heythrop Park, near Enstone, has also fallen down the list, from 263 to 297, though his wealth is unchanged at £275m. His plan to redevelop Alexandra Palace in London is said to be embroiled in legal wrangles.

Booksellers and publisher Toby Blackwell, and his nephew Nigel Blackwell, are also league tumblers - from number 249 to 303 - though again their estimated assets stay the same at £249m.

Toby Blackwell has given £5m towards the remodelling of Oxford's New Bodleian Library just along Broad Street from the original Blackwell's Bookshop founded in 1879.

A newcomer in the list is Iain Dorrity, chief executive of solar panel maker PV Crystalox Solar, based at Milton Park, near Didcot, who has an estimated £71m.

Yet another faller among Oxfordshire's richest is Syrian born Wafic Said, from 65 to 71. He has a 300 acre estate at Tusmore, near Bicester, and has a fortune estimated at £1bn.

In 1998 he donated £20m towards establishing the Said Business School in Park End Street, Oxford.

Among the risers are Stewart Milne and family who own Stewart Milne Timber Frame Systems in Witney. They feature at number 214, up from 251, with £294m.

Mining tycoon Roddie Fleming, who lives in West Oxfordshire, comes in at number 35 with £1,900m (£2bn), and Swiss foreign exchange dealer Urs Schwarzenbach at 88 with £852m.

Mr Schwarzenbach bought his house near Henley from Sir Martyn Arbib, who is at 239 with £370m.

Other notable inclusions are Lord Drayson, founder of Oxford biotech firm Powderject who falls from 834 to 969 with an unchanged £80m and serial entrepreneur Martyn Rose, chairman of Cowley-based Publishing Technology who has £85m, down from £88m last year, making him 789th.

Oxford actress Emma Watson, who recently turned 18, is now 55th equal in the list's section for young people, with an estimated £10m.