In 1900 it was one of the first two constituencies to elect a member from the then newly formed Labour Party, along with Merthyr Tydfil.
[1] Strutt was appointed Chief Commissioner of Railways, requiring a by-election.
Ponsonby succeeded to the peerage, becoming 5th Earl of Bessborough, causing a by-election.
The election was declared void on petition due to bribery and treating by Strutt's and Leveson-Gower's agents, and the writ suspended in March 1848, later causing a by-election.
The political parties had been making preparations for an election to take place in Autumn 1939 and by then, the following candidates had been selected; Notes References