Pro-European Tories like Michael Heseltine and Sir Edward Heath are not fighting for party position and will therefore not be cowed.

ECONOMIST: Roll up that map of Europe

Lord Saville of Newdigate has already heard evidence from more than 800 witnesses, including the prime minister in 1972, Sir Edward Heath.

BBC: Sir Mike was a captain in the Parachute Regiment at the time

After the last death of a former prime minister, Sir Edward Heath in 2005, the Commons staged an hour-long debate to pay tribute.

BBC: Manchester

Sir Edward Heath, who as Father of the House presided over last year's election, said he was unsure as to whether the system should be changed.

BBC: Ex-speakers back election changes

Since then it has attracted more than 45, 000 visitors but, despite these numbers, trustees of the Sir Edward Heath Charitable Foundation say it is not financially viable.

BBC: Plan to stop sale of Sir Edward Heath's Salisbury home

Even the Father of the House, and renowned grumpy old man, Sir Edward Heath offered a glowing tribute to the former Tiller girl who started work in the Commons as an MP's secretary.

BBC: Speaker goes out on a high note

Mr Batey, who worked as the parliamentary private secretary to Sir Edward Heath in the 1980s, remained in close contact with him after working and travelling with him on international visits, according to the Friends of Arundells.

BBC: Plan to stop sale of Sir Edward Heath's Salisbury home

Sir Edward Heath enjoyed life.

BBC: Obituary: Sir Edward Heath

Sir Winston Churchill received four points, as did Edward Heath and Harold Macmillan.

BBC: Margaret Thatcher ruled from 1979 to 1990