This number fell to just 6,000 after Gordon Brown introduced the new 50p top rate of income tax shortly before the last general election.
The figures have been seized upon by the Conservatives to claim that increasing the highest rate of tax actually led to a loss in revenues for the Government.
It is believed that rich Britons moved abroad or took steps to avoid paying the new levy by reducing their taxable incomes.
George Osborne, the Chancellor, announced in the Budget earlier this year that the 50p top rate will be reduced to 45p from next April.
via Two-thirds of millionaires left Britain to avoid 50p tax rate – Telegraph.