It sounds extraordinary but it's a fact that balance sheets can make fascinating reading.

From 1988 to 2000 Mary Archer was Chairwoman of the National Energy Foundation which promotes renewable energy and is now its president. In 2002 Mary Archer was appointed Chairwoman of Addenbrooke's NHS Trust Cambridge. Jeffrey Archer was subsequently convicted and imprisoned for perjury.

Despite her husband's offer to pay for her to have this surgery privately Mary Archer opted to be treated as a standard NHS patient on the public wards of her local hospital. In 1994 Lady Archer was a non-executive director of Anglia Television at a time when it was the target of a takeover bid. In 2002 Mary Archer was appointed Chairwoman of Addenbrooke's NHS Trust Cambridge.