1965 Abertillery by-election

The 1965 Abertillery by-election of 1 April 1965 was held after the death of Labour MP Llywelyn Williams.

The seat was very safe, having been won at the 1964 United Kingdom general election by over 20,000 votes^[1]

Result of the previous general election

General election 1964: Abertillery^[2]

Party		Candidate	Votes	%	±%
	Labour	Llywelyn Williams	24,204	85.9	+0.9
	Conservative	Peter Rees	3,973	14.1	−0.9
Majority			20,231	71.8	+1.8
Turnout			28,177	75.5	−6.4
Registered electors			37,310
	Labour hold		Swing

Result

1965 Abertillery by-election^[3][4][2]

Party		Candidate	Votes	%	±%
	Labour	Clifford Williams	18,256	79.0	−6.9
	Conservative	Peter Rees	3,309	14.3	+0.2
	Plaid Cymru	Edward Merriman	1,551	6.7	N/A
Majority			14,947	64.7	−7.1
Turnout			23,116	63.2	−12.3
Registered electors			36,567
	Labour hold		Swing