Sir David Bower Mitchell ( 20 June 1928 -- 30 August 2014 ) was a British Conservative politician who was a member of Parliament for over 30 years , and who served as a junior minister in Margaret Thatcher 's government .
Sir David Bower Mitchell ( 20 June 1928 -- 30 August 2014 ) was a British Conservative politician . He was a member of Parliament for over 30 years .