Donald Sumner

William Donald Massey Sumner, known as Donald Sumner, was a British Conservative Party politician who later became a judge. Sumner, the incumbent chairman of the divisional Conservative Association for Orpington, defeated Margaret Thatcher to be adopted prospective candidate for the local constituency.

Political career

He was elected at the 1955 Orpington by-election and was subsequently returned in the general election later that year. He remained Member of Parliament for Orpington in Kent until 1962, when he accepted an appointment as a County Court judge.
The resulting Orpington by-election was won by the Liberal Party candidate Eric Lubbock, marking the start of a revival in the fortunes of the Liberals.