[7] The same year, he became a member of the Executive Committee of the National Union of Conservative and Unionist Associations, a role he would hold until 1979.

[2] Finsberg was keen to get into Parliament, and, along with many others, he schemed to remove Hampstead's incumbent Conservative MP, Charles Challen, and replace him with Henry Brooke.

[6] In 1953, he moved to represent Hampstead's Central ward as a councillor, where he topped the poll, repeating this feat at the 1956 elections.

[9][2] He was Deputy Chairman (1969–1971) and Vice-President of the Association of Municipal Corporations (1971–74): Patrick Cosgrave, writing in The Independent, later said that Finsberg "had a deep, and almost tactile, understanding of how local government worked and he was a formidable administrator.

[2] Finsberg acted as Opposition spokesman on Greater London from 1974 to 1979, and was a member of the Executive of the 1922 Committee, representing Conservative backbenchers, from 1974 to 1975.

"[6] Boundary changes saw Finsberg become the MP for Hampstead and Highgate at the 1983 general election, at which he beat another Labour left-winger, John McDonnell.

From 1986 to 1989, he was President of the Greater London Area Executive Committee of the National Union of Conservative and Unionist Associations.

[2] In 1983, Finsberg became a member of the Parliamentary Assembly of the Council of Europe and the Western European Union; in 1987, he became its delegation leader.

"[6] Finsberg was the founding Vice-Chairman of the parliamentary branch of Conservative Friends of Israel: he broke the party Whip during the 1973 Yom Kippur War to vote against his leader Ted Heath's government in a division on an arms embargo.

[5] Finsberg retired from Parliament at the 1992 general election, at which his seat was taken by Labour's Glenda Jackson, defeating Conservative Oliver Letwin.

Finsberg served as a member (from 1983 to 1986) and Deputy Chairman (from 1986 to 1989) of the South East Regional Board at Trustee Savings Bank (TSB).

Finsberg was a patron of the Maccabi Association of Great Britain, and in 1993, became a trustee of the Marie Curie Cancer Foundation.