The 1956 Tonbridge by-election was held on 7 June 1956 due to the resignation of the Conservative Member of Parliament, Gerald Williams.
It was retained by the Conservative candidate Richard Hornby.
Although Tonbridge was usually a safe Conservative seat, this election was fought with a local Labour politician and against the backdrop of Anthony Eden's unpopular government, so the Conservative majority was cut to barely 1,600 votes.
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