1922 Pontypridd by-election

The 1922 Pontypridd by-election was held on 25 July 1922. The by-election was held due to the appointment of the incumbent Coalition Liberal MP, Thomas Arthur Lewis, as a Junior Lord of the Treasury. It was won by the Labour candidate Thomas Isaac Mardy Jones.^[1] It was the last of only eight ministerial by-elections in the UK not to be retained by the incumbent. The requirement for MPs who were appointed as ministers to seek re-election was entirely abolished by the Re-Election of Ministers Act (1919) Amendment Act 1926.^[2]

1922 Pontypridd by-election^[3]

Party		Candidate	Votes	%	±%
	Labour	Thomas Mardy-Jones	16,630	57.0	+14.2
C	Liberal	Thomas Arthur Lewis	12,550	43.0	−13.1
Majority			4,080	13.2	N/A
Turnout			29,180	72.8	+4.5
Registered electors			40,071
	Labour gain from Liberal		Swing

1922 Pontypridd by-election

← 1918 25 July 1922 1922 →

Candidate Jones Lewis Party Labour National Liberal Popular vote 16,630 12,550 Percentage 57.0% 43.0%

MP before election Lewis National Liberal Subsequent MP Mardy Jones Labour