William Donald Massey Sumner (13 August 1913 – 12 May 1990), 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.
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.
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| Parliament of the United Kingdom | ||
|---|---|---|
| Preceded bySir Waldron Smithers | Member of Parliament for Orpington 1955–1962 |
Succeeded byEric Lubbock |
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