1984 Cynon Valley by-election

1984 Cynon Valley by-election

← 1983 3 May 1984 1987 →

Constituency of Cynon Valley
Turnout65.7% (Decrease 7.7%)
  First party Second party
 
SDP
Candidate Ann Clwyd Felix Aubel
Party Labour SDP
Popular vote 19,389 6,554
Percentage 58.8 19.9
Swing Increase 2.8% Decrease 0.7%

  Third party Fourth party
 
PC
Candidate Clayton Jones James Arbuthnot
Party Plaid Cymru Conservative
Popular vote 3,619 2,441
Percentage 11.0 7.4
Swing Increase 1.8% Decrease 6.8%

MP before election

Ioan Evans
Labour

Elected MP

Ann Clwyd
Labour

The 1984 Cynon Valley by-election was a parliamentary by-election held on 3 May 1984 for the British House of Commons constituency of Cynon Valley.