There was a by-election in the British parliamentary constituency of Copeland on 23 February 2017, following the resignation of Labour Member of Parliament (MP) Jamie Reed. Conservative candidate Trudy Harrison gained the seat from Labour, the first gain for a governing party in a by-election since 1982.

There was a by-election in the constituency of Stoke-on-Trent Central on 23 February 2017 following the resignation of Labour's Tristram Hunt, who became director of the Victoria and Albert Museum in London. It took place alongside a by-election in Copeland.