The party were wary of her background and lack of constituency experience, which also led to her not being selected as a candidate for the Greater London Council.
After conducting constituency work, she became a life peer as Baroness Ewart-Biggs, of Ellis Green in the county of Essex, on 22 May 1981,[4] making her maiden speech in the House of Lords on Britain in the European Economic Community on 17 June 1981.
Lady Ewart-Biggs spoke on home affairs, Ireland and was on committees dedicated to helping people.
She was a founder member of the Council of Charter 88 and in 1989 wrote a public letter on its behalf to Prime Minister Margaret Thatcher calling for a written constitution.
She married Kevin Patrick O'Sullivan, a consulting engineer and her partner for 14 years, on 18 September 1992, and three weeks later she died in Charing Cross Hospital.