Sir William Ryrie

UK Treasury and World Bank official;

Born: November 10, 1928 ; Died: July 6 .2012.

Sir William Ryrie, who has died aged 83, was an influential figure in the UK Treasury for 20 years, a civil servant who worked with five prime ministers. Known to all as Bill, he famously drew up the so-called Ryrie Rules on private investment in the public sector during Margaret Thatcher's government, rules which eventually gave way to the Private Finance Initiative (PFI).

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