The 1958 East Aberdeenshire by-election was held on 20 November 1958 when the incumbent Conservative MP, Sir Robert Boothby was elevated to a life peerage. The by-election was retained by the Conservative candidate Patrick Wolrige-Gordon. Wolrige-Gordon was still an undergraduate at Oxford and at the time of his election the youngest MP.
References
East Aberdeenshire by-election, 1958 Wikipedia(Text) CC BY-SA