The Swansea District by-election, 1910 was a parliamentary by-election held for the House of Commons constituency of Swansea District in Glamorgan in South Wales on 28 February 1910.
Swansea District by-election, 1910 Wikipedia
The by-election was caused by the appointment of the sitting Liberal MP, Sir David Brynmor Jones, KC to be Recorder of Merthyr Tydfil. Under the Parliamentary rules of the day, if he wished to remain an MP, he was required to resign and fight a by-election.
The Swansea District Liberals re-selected Jones. At the general election of January 1910 he had been returned with the substantial majority of 6,073 votes over his Unionist opponent.
There being no other candidates putting themselves forward, Brynmor Jones was returned unopposed.