| Date
|
Event
|
Govt majority
|
Labour
|
Con
|
Lib
|
SNP
|
UUP
|
Plaid
|
Vang
|
SDLP
|
DUP
|
UUUP
|
ENP
|
SLP
|
Indep.
|
Spkr
|
Vacant
|
| 29 October 1974
|
Opening of Parliament
|
3
|
319
|
276
|
13
|
11
|
6
|
3
|
3
|
1
|
1
|
0
|
0
|
0
|
1
|
1
|
0
|
| 20 March 1975
|
Hamling (Lab, Woolwich W) dies
|
2
|
318
|
1
|
| 26 June 1975
|
Bottomley wins Woolwich W by-election for Cons
|
1
|
277
|
0
|
| 11 October 1975
|
Dunlop defects from Vanguard to UUUP
|
2
|
1
|
| 19 November 1975
|
Bradford defects from Vanguard to UUP
|
7
|
1
|
| 27 November 1975
|
Kilfedder defects from UUP, becomes Ind Unionist
|
6
|
2
|
| 14 December 1975
|
Edelman (Lab, Coventry NW) dies
|
0
|
317
|
1
|
| 15 January 1976
|
Carr (Con, Carshalton) elevated to Lords
|
1
|
276
|
2
|
| 3 February 1976
|
Thomas (Lab) becomes Spkr. Lloyd (Spk) resigns
|
2
|
316
|
3
|
| 4 March 1976
|
Robinson wins Coventry NW by-election for Lab
|
3
|
317
|
2
|
| 11 March 1976
|
Conservatives win Carshalton & Wirral by-elections
|
1
|
278
|
0
|
| 6 April 1976
|
O’Malley (Lab, Rotherham) dies
|
0
|
316
|
1
|
| 7 April 1976
|
Stonehouse resigns from Labour
|
-2
|
315
|
3
|
| 14 April 1976
|
Stonehouse joins English National Party
|
1
|
2
|
| 4 May 1976
|
Delargy (Lab, Thurrock) dies
|
-3
|
314
|
2
|
| 24 June 1976
|
Crowther wins Rotherham by-election for Lab
|
-2
|
315
|
1
|
| 15 July 1976
|
McDonald wins Thurrock by-election for Lab
|
-1
|
316
|
0
|
| 26 July 1976
|
Sillars & Robertson leave Labour for Scot Lab
|
-5
|
314
|
2
|
| 27 August 1976
|
Stonehouse (Eng Nat, Walsall N) resigns seat
|
-4
|
0
|
1
|
| 23 September 1976
|
Peart (Lab, Workington) elevated to Lords
|
-5
|
313
|
2
|
| 12 October 1976
|
Lane (Con, Cambridge) resigns seat
|
-4
|
277
|
3
|
| 21 October 1976
|
Short (Lab, Newcastle C) resigns seat
|
-5
|
312
|
4
|
| 4 November 1976
|
Cons win 2 by-elections, Lab win 1 (Newcastle C)
|
-6
|
313
|
279
|
1
|
| 2 December 1976
|
Rhodes James (Con) wins Cambridge by-election
|
-7
|
280
|
0
|
| 5 January 1977
|
Tugendhat (C), Marquand & Jenkins (Lab) resign
|
-8
|
311
|
279
|
3
|
| 19 February 1977
|
Crosland (Lab, Great Grimsby) dies
|
-9
|
310
|
4
|
| 24 February 1977
|
Brooke (Con) wins London & Wminster by-elect
|
-10
|
280
|
3
|
| 31 March 1977
|
MacKay (Con) wins Birmingham Stechford b-e
|
-11 (15)
|
281
|
2
|
| 16 April 1977
|
Kirk (Con, Saffron Walden) dies
|
-10 (16)
|
280
|
3
|
| 28 April 1977
|
Cons win Ashfield, Lab win Grimsby by-elections
|
311
|
281
|
1
|
| 16 June 1977
|
Walden (Lab, Birm Ladywood) resigns seat
|
-11 (15)
|
310
|
2
|
| 7 July 1977
|
Haselhurst wins Saffron Walden by-el for Cons
|
-12 (14)
|
282
|
1
|
| 25 July 1977
|
Cordle (Con, Bournemouth E) resigns seat
|
-11 (15)
|
281
|
2
|
| 18 August 1977
|
Sever wins Birm Ladywood by-election for Lab
|
-10 (16)
|
311
|
1
|
| 8 October 1977
|
Prentice defects from Labour to Conservatives
|
-12 (14)
|
310
|
282
|
| 29 October 1977
|
Miller (Lab, Ilford N) dies
|
-13 (13)
|
309
|
2
|
| 24 November 1977
|
Atkinson wins Bournemouth E by-el for Cons
|
-14 (12)
|
283
|
1
|
| 26 November 1977
|
Craig defects from Vanguard to UUP
|
7
|
0
|
| 18 January 1978
|
Small (Lab, Glasgow Garscadden) dies
|
-15 (11)
|
308
|
2
|
| 19 January 1978
|
Hall (Con, Wycombe) dies
|
-14 (12)
|
282
|
3
|
| 22 February 1978
|
Lipton (Lab, Lambeth C) dies
|
-15 (11)
|
307
|
4
|
| 2 March 1978
|
Bendall wins Ilford N by-election for Cons
|
-16 (10)
|
283
|
3
|
| 23 March 1978
|
Wilson (Lab, Hamilton) dies
|
-17 (9)
|
306
|
4
|
| 6 April 1978
|
Rawlinson (Con, Epsom & Ewell) resigns seat
|
-16 (10)
|
282
|
5
|
| 13 April 1978
|
Dewar wins Glasgow Gars by-election for Lab
|
-15 (11)
|
307
|
4
|
| 20 April 1978
|
Tilley wins Lambeth C by-election for Lab
|
-14 (12)
|
308
|
3
|
| 27 April 1978
|
Conservatives win Wycombe, Epsom by-elections
|
-16 (10)
|
284
|
1
|
| 16 May 1978
|
Hatton (Lab, Manchester Moss Side) dies
|
-17 (9)
|
307
|
2
|
| 20 May 1978
|
Mendelson (Lab, Penistone) dies
|
-18 (8)
|
306
|
3
|
| 31 May 1978
|
Robertson wins Hamilton by-election for Lab
|
-17 (9)
|
307
|
2
|
| 24 June 1978
|
Harper (Lab, Pontefract & Castleford) dies
|
-18 (8)
|
306
|
3
|
| 13 July 1978
|
Labour wins Penistone, Moss Side by-elections
|
-16 (10)
|
308
|
1
|
| 30 July 1978
|
Mackintosh (Lab, Berwick & E Lothian) dies
|
-17 (9)
|
307
|
2
|
| 26 October 1978
|
Labour wins 2 by-elections; Walder (Con) dies
|
-14
|
309
|
283
|
1
|
| 6 November 1978
|
Davies (Con, Knutsford) resigns seat
|
-13
|
282
|
2
|
| 15 December 1978
|
Irvine (Lab, Liverpool Edge Hill) dies
|
-14
|
308
|
3
|
| 14 February 1979
|
Maudling (Con, Chipping Barnet) dies
|
-13
|
281
|
4
|
| 1 March 1979
|
Conservatives win Clitheroe & Knutsford by-els
|
-15
|
283
|
2
|
| 2 March 1979
|
Swain (Lab, NE Derbyshire) dies
|
-16
|
307
|
3
|
| 29 March 1979
|
Alton wins Edge Hill by-election for Liberals
|
-17
|
14
|
2
|
| 30 March 1979
|
Neave (Con, Abingdon) dies
|
-16
|
282
|
3
|
| 2 April 1979
|
Broughton (Lab, Batley & Morley) dies
|
-17
|
306
|
4
|
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