The seat had become vacant when the constituency's Labour Member of Parliament (MP) Tony Benn had inherited from his father a hereditary peerage as Viscount Stansgate, thus making him ineligible to serve in the House of Commons. He had been elected at a by-election in 1950.
When the law was later changed to allow Benn to renounce his peerage, St Clair resigned his seat, and Benn was returned to the House of Commons at the 1963 Bristol South East by-election.
|Labour||Viscount Stansgate (Tony Benn) (disqualified)||23,275||69.5||+13.3|
|Conservative||Malcolm St Clair||10,231||30.5||−13.3|
|Conservative gain from Labour||Swing||−13.3|