# List of United Kingdom by-elections (1950–1979)

This is a list of parliamentary by-elections in the United Kingdom, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighted: red for a Labour gain, blue for a Conservative gain, orange for a Liberal gain, yellow for an SNP gain, green for a Plaid Cymru gain and grey for any other gain.

## Resignations

    See Resignation from the House of Commons of the United Kingdom for more details.
Where the cause of by-election is given as "resignation" or "seeks re-election", this indicates that the incumbent was appointed on his or her own request to an "office of profit under the Crown", either the Steward of the Chiltern Hundreds or the Steward of the Manor of Northstead. These appointments are made as a constitutional device for leaving the House of Commons, whose Members are not permitted to resign.

## By-elections

October 1974–1979 Parliament :
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Liverpool Edge Hill | 29 March 1979 | Sir Arthur Irvine | | Labour | David Alton | | Liberal | Death |
| Knutsford | 1 March 1979 | John Davies | | Conservative | Jock Bruce-Gardyne | | Conservative | Resignation on medical advice |
| Clitheroe | 1 March 1979 | David Walder | | Conservative | David Waddington | | Conservative | Death |
| Pontefract and Castleford | 26 October 1978 | Joe Harper | | Labour | Geoffrey Lofthouse | | Labour | Death |
| Berwick and East Lothian | 26 October 1978 | John Mackintosh | | Labour | John Home Robertson | | Labour | Death |
| Penistone | 13 July 1978 | John Mendelson | | Labour | Allen McKay | | Labour | Death |
| Manchester Moss Side | 13 July 1978 | Frank Hatton | | Labour | George Morton | | Labour | Death |
| Hamilton | 31 May 1978 | Alexander Wilson | | Labour | George Robertson | | Labour | Death |
| Wycombe | 27 April 1978 | Sir John Hall | | Conservative | Ray Whitney | | Conservative | Death |
| Epsom and Ewell | 27 April 1978 | Peter Rawlinson | | Conservative | Archie Hamilton | | Conservative | Life peerage |
| Lambeth Central | 20 April 1978 | Marcus Lipton | | Labour | John Tilley | | Labour | Death |
| Glasgow Garscadden | 13 April 1978 | William Small | | Labour | Donald Dewar | | Labour | Death |
| Ilford North | 2 March 1978 | Millie Miller | | Labour | Vivian Bendall | | Conservative | Death |
| Bournemouth East | 24 November 1977 | John Cordle | | Conservative | David Atkinson | | Conservative | Resignation: found in contempt of the House |
| Birmingham Ladywood | 18 August 1977 | Brian Walden | | Labour | John Sever | | Labour | Appointment as presenter of LWT programme Weekend World |
| Saffron Walden | 7 July 1977 | Sir Peter Kirk | | Conservative | Alan Haselhurst | | Conservative | Death |
| Grimsby | 28 April 1977 | Anthony Crosland | | Labour | Austin Mitchell | | Labour | Death |
| Ashfield | 28 April 1977 | David Marquand | | Labour | Tim Smith | | Conservative | New career as Chief of Staff to Roy Jenkins |
| Birmingham Stechford | 31 March 1977 | Roy Jenkins | | Labour | Andrew MacKay | | Conservative | President of the European Commission |
| City of London and Westminster South | 24 February 1977 | Christopher Tugendhat | | Conservative | Peter Brooke | | Conservative | European Commissioner |
| Cambridge | 2 December 1976 | David Lane | | Conservative | Robert Rhodes James | | Conservative | New career as chairman for the Commission for Racial Equality |
| Workington | 4 November 1976 | Fred Peart | | Labour | Richard Page | | Conservative | Life peerage on appointment as Leader of the House of Lords |
| Walsall North | 4 November 1976 | John Stonehouse | | Labour/English National | Robin Hodgson | | Conservative | Resignation (convicted of insurance fraud) |
| Newcastle-upon-Tyne Central | 4 November 1976 | Edward Short | | Labour | Harry Cowans | | Labour | New career as chairman of Cable & Wireless |
| Thurrock | 15 July 1976 | Hugh Delargy | | Labour | Oonagh McDonald | | Labour | Death |
| Rotherham | 24 June 1976 | Brian O'Malley | | Labour | Stanley Crowther | | Labour | Death |
| Wirral | 11 March 1976 | Selwyn Lloyd | | Speaker | David Hunt | | Conservative | Life peerage |
| Carshalton | 11 March 1976 | Robert Carr | | Conservative | Nigel Forman | | Conservative | Life peerage |
| Coventry North West | 4 March 1976 | Maurice Edelman | | Labour | Geoffrey Robinson | | Labour | Death |
| Woolwich West | 26 June 1975 | William Hamling | | Labour | Peter Bottomley | | Conservative | Death |
| 1 2 3 Gain retained at the 1979 general election. 1 2 3 4 Gain not retained at the 1979 UK general election. February–October 1974 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Newham South | 23 May 1974 | Sir Elwyn Jones | | Labour | Nigel Spearing | | Labour | Life peerage on appointment as Lord High Chancellor of Great Britain |
| 1970 – February 1974 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Hove | 8 November 1973 | Martin Maddan | | Conservative | Timothy Sainsbury | | Conservative | Death |
| Glasgow Govan | 8 November 1973 | John Rankin | | Labour | Margo MacDonald | | SNP | Death |
| Edinburgh North | 8 November 1973 | Earl of Dalkeith | | Conservative | Alexander Fletcher | | Conservative | Succession to the Peerage |
| Berwick-upon-Tweed | 8 November 1973 | Antony Lambton | | Conservative | Alan Beith | | Liberal | Resignation (scandal) |
| Ripon | 26 July 1973 | Malcolm Stoddart-Scott | | Conservative | David Austick | | Liberal | Death |
| Isle of Ely | 26 July 1973 | Harry Legge-Bourke | | Conservative | Clement Freud | | Liberal | Death |
| Manchester Exchange | 27 June 1973 | William Griffiths | | Labour | Frank Hatton | | Labour | Death |
| Westhoughton | 24 May 1973 | Tom Price | | Labour | Roger Stott | | Labour | Death |
| West Bromwich | 24 May 1973 | Maurice Foley | | Labour | Betty Boothroyd | | Labour | Appointment to the European Commission staff |
| Lincoln | 1 March 1973 | Dick Taverne | | Labour/Democratic Labour | Dick Taverne | | Democratic Labour | Sought re-election upon change of party allegiance |
| Dundee East | 1 March 1973 | George Thomson | | Labour | George Machin | | Labour | Appointment as European Commissioner |
| Chester-le-Street | 1 March 1973 | Norman Pentland | | Labour | Giles Radice | | Labour | Death |
| Uxbridge | 7 December 1972 | Charles Curran | | Conservative | Michael Shersby | | Conservative | Death |
| Sutton and Cheam | 7 December 1972 | Richard Sharples | | Conservative | Graham Tope | | Liberal | Governor of Bermuda |
| Rochdale | 26 October 1972 | Jack McCann | | Labour | Cyril Smith | | Liberal | Death |
| Southwark | 4 May 1972 | Ray Gunter | | Labour/Independent Labour | Harry Lamborn | | Labour | Resignation (dispute with party) |
| Kingston-upon-Thames | 4 May 1972 | John Boyd-Carpenter | | Conservative | Norman Lamont | | Conservative | Chairman of Civil Aviation Authority |
| Merthyr Tydfil | 13 April 1972 | S. O. Davies | | Independent Labour | Edward Rowlands | | Labour | Death |
| Macclesfield | 30 September 1971 | Sir Arthur Vere Harvey | | Conservative | Nicholas Winterton | | Conservative | Life peerage |
| Widnes | 23 September 1971 | James MacColl | | Labour | Gordon Oakes | | Labour | Death |
| Stirling and Falkirk | 16 September 1971 | Malcolm Macpherson | | Labour | Harry Ewing | | Labour | Death |
| Greenwich | 8 July 1971 | Richard Marsh | | Labour | Guy Barnett | | Labour | Chairman of British Rail |
| Hayes and Harlington | 17 June 1971 | Arthur Skeffington | | Labour | Neville Sandelson | | Labour | Death |
| Goole | 27 May 1971 | George Jeger | | Labour | Edmund Marshall | | Labour | Death |
| Bromsgrove | 27 May 1971 | James Dance | | Conservative | Terry Davis | | Labour | Death |
| Southampton Itchen | 27 May 1971 | Horace King | | Speaker | Bob Mitchell | | Labour | Life peerage |
| Arundel and Shoreham | 1 April 1971 | Henry Kerby | | Conservative | Richard Luce | | Conservative | Death |
| Liverpool Scotland | 1 April 1971 | Walter Alldritt | | Labour | Frank Marsden | | Labour | Resignation |
| Enfield West | 19 November 1970 | Iain Macleod | | Conservative | Cecil Parkinson | | Conservative | Death |
| St Marylebone | 22 October 1970 | Quintin Hogg | | Conservative | Kenneth Baker | | Conservative | Life peerage on appointment as Lord High Chancellor of Great Britain |
| 1 2 3 4 Gain not retained at the February 1974 general election. 1 2 3 4 5 Gain retained at the February 1974 UK general election. ↑ George Machin retained the seat for Labour in the by-election but lost it to the SNP in the February 1974 UK general election. 1966–1970 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| South Ayrshire | 19 March 1970 | Emrys Hughes | | Labour | James Sillars | | Labour | Death |
| Bridgwater | 12 March 1970 | Gerald Wills | | Conservative | Tom King | | Conservative | Death |
| Wellingborough | 4 December 1969 | Harry Howarth | | Labour | Peter Fry | | Conservative | Death |
| Louth | 4 December 1969 | Sir Cyril Osborne | | Conservative | Jeffrey Archer | | Conservative | Death |
| Swindon | 30 October 1969 | Francis Noel-Baker | | Labour | Christopher Ward | | Conservative | Resignation |
| Paddington North | 30 October 1969 | Ben Parkin | | Labour | Arthur Latham | | Labour | Death |
| Newcastle-under-Lyme | 30 October 1969 | Stephen Swingler | | Labour | John Golding | | Labour | Death |
| Islington North | 30 October 1969 | Gerald Reynolds | | Labour | Michael O'Halloran | | Labour | Death |
| Glasgow Gorbals | 30 October 1969 | Alice Cullen | | Labour | Frank McElhone | | Labour | Death |
| Birmingham Ladywood | 26 June 1969 | Victor Yates | | Labour | Wallace Lawler | | Liberal | Death |
| Chichester | 22 May 1969 | Walter Loveys | | Conservative | Christopher Chataway | | Conservative | Death |
| Mid Ulster | 17 April 1969 | George Forrest | | UUP | Bernadette Devlin | | Unity | Death |
| Weston-super-Mare | 27 March 1969 | David Webster | | Conservative | Jerry Wiggin | | Conservative | Death |
| Walthamstow East | 27 March 1969 | William Robinson | | Labour | Michael McNair-Wilson | | Conservative | Death |
| Brighton Pavilion | 27 March 1969 | Sir William Teeling | | Conservative | Julian Amery | | Conservative | Resignation |
| New Forest | 7 November 1968 | Oliver Crosthwaite-Eyre | | Conservative | Patrick McNair-Wilson | | Conservative | Resignation |
| Bassetlaw | 31 October 1968 | Frederick Bellenger | | Labour | Joseph Ashton | | Labour | Death |
| Caerphilly | 18 July 1968 | Ness Edwards | | Labour | Alfred Evans | | Labour | Death |
| Nelson and Colne | 27 June 1968 | Sydney Silverman | | Labour | David Waddington | | Conservative | Death |
| Sheffield Brightside | 13 June 1968 | Richard Winterbottom | | Labour | Edward Griffiths | | Labour | Death |
| Oldham West | 13 June 1968 | Leslie Hale | | Labour | Bruce Campbell | | Conservative | Resignation |
| Warwick and Leamington | 28 March 1968 | John Hobson | | Conservative | Dudley Smith | | Conservative | Death |
| Meriden | 28 March 1968 | Christopher Rowland | | Labour | Keith Speed | | Conservative | Death |
| Dudley | 28 March 1968 | George Wigg | | Labour | Donald Williams | | Conservative | Life peerage on appointment as chairman of Horserace Betting Levy Board |
| Acton | 28 March 1968 | Bernard Floud | | Labour | Kenneth Baker | | Conservative | Death (suicide) |
| Kensington South | 14 March 1968 | William Roots | | Conservative | Sir Brandon Rhys Williams | | Conservative | Resignation (ill-health?) |
| Derbyshire West | 23 November 1967 | Aidan Crawley | | Conservative | James Scott-Hopkins | | Conservative | Appointment as chairman of London Weekend Television |
| Manchester Gorton | 2 November 1967 | Konni Zilliacus | | Labour | Kenneth Marks | | Labour | Death |
| Leicester South West | 2 November 1967 | Herbert Bowden | | Labour | Thomas Boardman | | Conservative | Appointment as chairman of Independent Television Authority |
| Hamilton | 2 November 1967 | Thomas Fraser | | Labour | Winifred Ewing | | SNP | Appointment to North Scotland Hydro-Electricity Board |
| Walthamstow West | 21 September 1967 | Edward Redhead | | Labour | Frederick Silvester | | Conservative | Death |
| Cambridge | 21 September 1967 | Robert Davies | | Labour | David Lane | | Conservative | Death |
| Brierley Hill | 27 April 1967 | John Talbot | | Conservative | Fergus Montgomery | | Conservative | Death |
| Honiton | 16 March 1967 | Robert Mathew | | Conservative | Peter Emery | | Conservative | Death |
| Rhondda West | 9 March 1967 | Iorwerth Thomas | | Labour | Alec Jones | | Labour | Death |
| Nuneaton | 9 March 1967 | Frank Cousins | | Labour | Leslie Huckfield | | Labour | Resignation |
| Glasgow Pollok | 9 March 1967 | Alexander Garrow | | Labour | Esmond Wright | | Conservative | Death |
| Carmarthen | 14 July 1966 | Megan Lloyd George | | Labour | Gwynfor Evans | | Plaid Cymru | Death |
| 1 2 3 4 5 6 7 Gain retained at the 1970 general election. 1 2 3 4 5 6 7 8 9 Gain not retained at the 1970 UK general election. 1964–1966 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Kingston upon Hull North | 27 January 1966 | Henry Solomons | | Labour | Kevin McNamara | | Labour | Death |
| Erith and Crayford | 11 November 1965 | Norman Dodds | | Labour | James Wellbeloved | | Labour | Death |
| Cities of London and Westminster | 4 November 1965 | Sir Harry Hylton-Foster | | Speaker | John Smith | | Conservative | Death |
| Hove | 22 July 1965 | Anthony Marlowe | | Conservative | Martin Maddan | | Conservative | Resignation (ill-health) |
| Birmingham Hall Green | 6 May 1965 | Aubrey Jones | | Conservative | Reginald Eyre | | Conservative | Appointment as chairman of National Board for Prices and Incomes |
| Abertillery | 1 April 1965 | Llywelyn Williams | | Labour | Clifford Williams | | Labour | Death |
| Roxburgh, Selkirk and Peebles | 24 March 1965 | Charles Donaldson | | Conservative | David Steel | | Liberal | Death |
| Saffron Walden | 23 March 1965 | R. A. Butler | | Conservative | Peter Kirk | | Conservative | Life peerage |
| Salisbury | 4 February 1965 | John Morrison | | Conservative | Michael Hamilton | | Conservative | Hereditary peerage |
| East Grinstead | 4 February 1965 | Evelyn Emmet | | Conservative | Geoffrey Johnson Smith | | Conservative | Life peerage |
| Altrincham and Sale | 4 February 1965 | Fred Erroll | | Conservative | Anthony Barber | | Conservative | Hereditary peerage |
| Nuneaton | 21 January 1965 | Frank Bowles | | Labour | Frank Cousins | | Labour | Life peerage to provide seat for Minister of Technology Frank Cousins |
| Leyton | 21 January 1965 | Reg Sorensen | | Labour | Ronald Buxton | | Conservative | Life peerage to provide seat for Foreign Secretary Patrick Gordon Walker |
| ↑ Gain retained at the 1966 general election. ↑ Gain not retained at the 1966 UK general election. 1959–1964 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Liverpool Scotland | 11 June 1964 | David Logan | | Labour | Walter Alldritt | | Labour | Death |
| Faversham | 4 June 1964 | Percy Wells | | Labour | Terence Boston | | Labour | Death |
| Winchester | 14 May 1964 | Peter Smithers | | Conservative | Morgan Morgan-Giles | | Conservative | Appointment as Secretary-General of Council of Europe |
| Rutherglen | 14 May 1964 | Richard Brooman-White | | Conservative | Gregor Mackenzie | | Labour | Death |
| Devizes | 14 May 1964 | Percivall Pott | | Conservative | Charles Morrison | | Conservative | Death |
| Bury St Edmunds | 14 May 1964 | Sir William Aitken | | Conservative | Eldon Griffiths | | Conservative | Death |
| Dumfriesshire | 12 December 1963 | Niall MacPherson | | Conservative | David Anderson | | Conservative | Hereditary peerage |
| Sudbury and Woodbridge | 5 December 1963 | John Hare | | Conservative | Keith Stainton | | Conservative | Hereditary peerage |
| St Marylebone | 5 December 1963 | Sir Wavell Wakefield | | Conservative | Quintin Hogg | | Conservative | Hereditary peerage |
| Manchester Openshaw | 5 December 1963 | William Williams | | Labour | Charles Morris | | Labour | Death |
| Dundee West | 21 November 1963 | John Strachey | | Labour | Peter Doig | | Labour | Death |
| Luton | 7 November 1963 | Dr. Charles Hill | | Conservative | Will Howie | | Labour | Life peerage on appointment as chairman of Independent Television Authority |
| Kinross and Western Perthshire | 7 November 1963 | Gilmour Leburn | | Conservative | Sir Alec Douglas-Home | | Conservative | Death |
| Belfast South | 22 October 1963 | Sir David Campbell | | UUP | Rafton Pounder | | UUP | Death |
| Bristol South East | 20 August 1963 | Malcolm St Clair | | Conservative | Tony Benn | | Labour | Resignation |
| Stratford | 15 August 1963 | John Profumo | | Conservative | Angus Maude | | Conservative | Resignation (lying to the House of Commons) |
| West Bromwich | 4 July 1963 | John Dugdale | | Labour | Maurice Foley | | Labour | Death |
| Deptford | 4 July 1963 | Sir Leslie Plummer | | Labour | John Silkin | | Labour | Death |
| Leeds South | 20 June 1963 | Hugh Gaitskell | | Labour | Merlyn Rees | | Labour | Death |
| Swansea East | 28 March 1963 | David Mort | | Labour | Neil McBride | | Labour | Death |
| Rotherham | 28 March 1963 | Jack Jones | | Labour | Brian O'Malley | | Labour | Death (road accident) |
| Colne Valley | 21 March 1963 | Glenvil Hall | | Labour | Patrick Duffy | | Labour | Death |
| Northamptonshire South | 22 November 1962 | Sir Reginald Manningham-Buller | | Conservative | Arthur Jones | | Conservative | Hereditary peerage on appointment as Lord High Chancellor of Great Britain |
| Norfolk Central | 22 November 1962 | Richard Collard | | Conservative | Ian Gilmour | | Conservative | Death |
| Glasgow Woodside | 22 November 1962 | William Grant | | Conservative | Neil Carmichael | | Labour | Appointment as Lord Justice Clerk |
| Dorset South | 22 November 1962 | Viscount Hinchingbrooke | | Conservative | Guy Barnett | | Labour | Succession to peerage |
| Chippenham | 22 November 1962 | David Eccles | | Conservative | Daniel Awdry | | Conservative | Hereditary peerage |
| Leicester North East | 12 July 1962 | Sir Lynn Ungoed-Thomas | | Labour | Tom Bradley | | Labour | Appointment as High Court Judge |
| West Lothian | 14 June 1962 | John Taylor | | Labour | Tam Dalyell | | Labour | Death |
| West Derbyshire | 6 June 1962 | Edward Wakefield | | Conservative | Aidan Crawley | | Conservative | Appointment as Commissioner for Malta |
| Middlesbrough West | 6 June 1962 | Sir Jocelyn Simon | | Conservative | Jeremy Bray | | Labour | Appointment as President of Probate Division of the High Court |
| Montgomeryshire | 15 May 1962 | Clement Davies | | Liberal | Emlyn Hooson | | Liberal | Death |
| Derby North | 17 April 1962 | Clifford Wilcock | | Labour | Niall MacDermot | | Labour | Death |
| Stockton-on-Tees | 5 April 1962 | George Chetwynd | | Labour | Bill Rodgers | | Labour | Appointment as director of North-East Development Council |
| Pontefract | 22 March 1962 | George Sylvester | | Labour | Joseph Harper | | Labour | Death |
| Orpington | 14 March 1962 | Donald Sumner | | Conservative | Eric Lubbock | | Liberal | Appointment as County Court Judge |
| Middlesbrough East | 14 March 1962 | Hilary Marquand | | Labour | Arthur Bottomley | | Labour | Appointment as director of International Institute for Labour Studies, Geneva |
| Blackpool North | 13 March 1962 | Toby Low | | Conservative | Norman Miscampbell | | Conservative | Hereditary peerage |
| Lincoln | 8 March 1962 | Geoffrey de Freitas | | Labour | Dick Taverne | | Labour | Appointed as High Commissioner to Ghana |
| Glasgow Bridgeton | 16 November 1961 | James Carmichael | | Labour | James Bennett | | Labour | Resignation (ill-health?) |
| Oswestry | 9 November 1961 | David Ormsby-Gore | | Conservative | John Biffen | | Conservative | Appointment as Ambassador to the United States |
| East Fife | 9 November 1961 | Sir James Henderson-Stewart, Bt. | | Conservative | Sir John E. Gilmour | | Conservative | Death |
| Manchester Moss Side | 7 November 1961 | James Watts | | Conservative | Frank Taylor | | Conservative | Death |
| Bristol South East | 4 May 1961 | Tony Benn | | Labour | Malcolm St Clair | | Conservative | Succession to peerage |
| Warrington | 20 April 1961 | Dr Edith Summerskill | | Labour | Thomas Williams | | Labour | Life peerage |
| Paisley | 20 April 1961 | Douglas Johnston | | Labour | John Robertson | | Labour | Appointment to Court of Session |
| Birmingham Small Heath | 23 March 1961 | William Wheeldon | | Labour | Denis Howell | | Labour | Death |
| Worcester | 16 March 1961 | George Ward | | Conservative | Peter Walker | | Conservative | Hereditary peerage |
| High Peak | 16 March 1961 | Hugh Molson | | Conservative | David Walder | | Conservative | Life peerage |
| Colchester | 16 March 1961 | Cuthbert Alport | | Conservative | Antony Buck | | Conservative | Life peerage on appointment as High Commissioner to Rhodesia |
| Cambridgeshire | 16 March 1961 | Gerald Howard | | Conservative | Francis Pym | | Conservative | Appointment as High Court Judge |
| Blyth | 24 November 1960 | Alfred Robens | | Labour | Eddie Milne | | Labour | Appointment as chairman of National Coal Board |
| Ebbw Vale | 17 November 1960 | Aneurin Bevan | | Labour | Michael Foot | | Labour | Death |
| Tiverton | 16 November 1960 | Derick Heathcoat-Amory | | Conservative | Robin Maxwell-Hyslop | | Conservative | Hereditary peerage |
| Petersfield | 16 November 1960 | Hon. Peter Legh | | Conservative | Joan Quennell | | Conservative | Succession to peerage |
| Ludlow | 16 November 1960 | Christopher Holland-Martin | | Conservative | Jasper More | | Conservative | Death |
| Carshalton | 16 November 1960 | Antony Head | | Conservative | Walter Elliot | | Conservative | Hereditary peerage on appointment as High Commissioner to Nigeria |
| Bolton East | 16 November 1960 | Philip Bell | | Conservative | Edwin Taylor | | Conservative | Appointment as County Court Judge |
| Mid Bedfordshire | 16 November 1960 | Alan Lennox-Boyd | | Conservative | Stephen Hastings | | Conservative | Hereditary peerage |
| Edinburgh North | 19 May 1960 | William Rankine Milligan | | Conservative | Earl of Dalkeith | | Conservative | Appointment to Court of Session |
| Harrow West | 17 March 1960 | Sir Albert Braithwaite | | Conservative | John Page | | Conservative | Death (suicide) |
| Brighouse and Spenborough | 17 March 1960 | Lewis John Edwards | | Labour | Michael Shaw | | Conservative | Death |
| 1 2 3 4 5 6 Gain retained at the 1964 general election. 1 2 Tony Benn won the most votes but was disqualified by virtue of his Peerage; the Election Court declared Malcolm St Clair duly elected. St Clair undertook that if the law was changed to allow Benn to disclaim his hereditary peerage, he would resign and create a by-election. The law was changed by the Peerage Act 1963 and St Clair duly resigned, allowing Benn to return to the Commons in 1963. ↑ Gain not retained at the 1964 UK general election. ↑ Edwin Taylor retained the seat for the Conservatives in the by-election but lost it to Labour in the 1964 UK general election. ↑ A rare occasion when an incumbent government gained a seat from the opposition in a by-election, although it was lost at the 1964 UK general election. 1955–1959 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Whitehaven | 18 June 1959 | Frank Anderson | | Labour | Joseph Symonds | | Labour | Death |
| Penistone | 11 June 1959 | Henry McGhee | | Labour | John Mendelson | | Labour | Death |
| Galloway | 9 April 1959 | John Mackie | | Conservative | John Brewis | | Conservative | Death |
| South West Norfolk | 25 March 1959 | Sidney Dye | | Labour | Albert Hilton | | Labour | Death (road accident) |
| Harrow East | 19 March 1959 | Ian Harvey | | Conservative | Anthony Courtney | | Conservative | Resignation (scandal) |
| Belfast East | 19 March 1959 | Alan McKibbin | | UUP | Stanley McMaster | | UUP | Death |
| Southend West | 29 January 1959 | Sir Henry Channon | | Conservative | Paul Channon | | Conservative | Death |
| Shoreditch and Finsbury | 27 November 1958 | Victor Collins | | Labour | Michael Cliffe | | Labour | Elevation to a life peerage |
| East Aberdeenshire | 20 November 1958 | Sir Robert Boothby | | Conservative | Patrick Wolrige-Gordon | | Conservative | Elevation to a life peerage |
| Pontypool | 10 November 1958 | Granville West | | Labour | Leo Abse | | Labour | Elevation to a life peerage |
| Chichester | 6 November 1958 | Hon. Sir Lancelot Joynson-Hicks | | Conservative | Walter Loveys | | Conservative | Succession to the peerage |
| Morecambe and Lonsdale | 6 November 1958 | Sir Ian Fraser | | Conservative | Basil de Ferranti | | Conservative | Elevation to a life peerage |
| Argyll | 12 June 1958 | Sir Duncan McCallum | | Conservative | Michael Noble | | Conservative | Death |
| Weston-super-Mare | 12 June 1958 | Sir Ian Orr-Ewing | | Conservative | David Webster | | Conservative | Death |
| Wigan | 12 June 1958 | Ronald Williams | | Labour | Alan Fitch | | Labour | Death |
| St Helens | 12 June 1958 | Sir Hartley Shawcross | | Labour | Leslie Spriggs | | Labour | Resignation |
| Ealing South | 12 June 1958 | Angus Maude | | Conservative | Brian Batsford | | Conservative | Resignation |
| Islington North | 15 May 1958 | Wilfred Fienburgh | | Labour | Gerald Reynolds | | Labour | Death (road accident) |
| Torrington | 27 March 1958 | George Lambert | | National Liberal and Conservative | Mark Bonham-Carter | | Liberal | Succession to peerage |
| Glasgow Kelvingrove | 13 March 1958 | Walter Elliot | | Conservative | Mary McAlister | | Labour | Death |
| Rochdale | 12 February 1958 | Wentworth Schofield | | Conservative | Jack McCann | | Labour | Death |
| Liverpool Garston | 5 December 1957 | Sir Victor Raikes | | Conservative / Independent Conservative | Richard Bingham | | Conservative | Resignation (dispute with party) |
| Leicester South-East | 28 November 1957 | Charles Waterhouse | | Conservative | John Peel | | Conservative | Resignation |
| Ipswich | 24 October 1957 | Richard Stokes | | Labour | Dingle Foot | | Labour | Death |
| Gloucester | 12 September 1957 | Moss Turner-Samuels | | Labour | Jack Diamond | | Labour | Death |
| North Dorset | 27 June 1957 | Robert Crouch | | Conservative | Richard Glyn | | Conservative | Death |
| Hornsey | 30 May 1957 | Sir David Gammans | | Conservative | Lady Muriel Gammans | | Conservative | Death |
| East Ham North | 30 May 1957 | Percy Daines | | Labour | Reginald Prentice | | Labour | Death |
| Edinburgh South | 29 May 1957 | Sir William Darling | | Conservative | Michael Hutchison | | Conservative | Resignation |
| Newcastle-upon-Tyne North | 21 March 1957 | Gwilym Lloyd George | | National Liberal and Conservative | William Elliott | | Conservative | Elevation to a hereditary peerage |
| Beckenham | 21 March 1957 | Patrick Buchan-Hepburn | | Conservative | Philip Goodhart | | Conservative | Elevation to a hereditary peerage |
| Warwick and Leamington | 7 March 1957 | Sir Anthony Eden | | Conservative | John Hobson | | Conservative | Resignation due to ill health |
| Bristol West | 7 March 1957 | Walter Monckton | | Conservative | Robert Cooke | | Conservative | Elevation to a hereditary peerage |
| Carmarthen | 28 February 1957 | Rhys Hopkin Morris | | Liberal | Megan Lloyd George | | Labour | Death |
| Wednesbury | 28 February 1957 | Stanley Evans | | Labour | John Stonehouse | | Labour | Resignation (disagreement with party over Suez) |
| Lewisham North | 14 February 1957 | Sir Austin Hudson, Bt. | | Conservative | Niall MacDermot | | Labour | Death |
| Melton | 19 December 1956 | Anthony Nutting | | Conservative | Mervyn Pike | | Conservative | Resignation (disagreement with party over Suez) |
| City of Chester | 15 November 1956 | Basil Nield | | Conservative | John Temple | | Conservative | Recorder of Manchester |
| Chester-le-Street | 27 September 1956 | Patrick Bartley | | Labour | Norman Pentland | | Labour | Death |
| Newport | 6 July 1956 | Peter Freeman | | Labour | Sir Frank Soskice | | Labour | Death |
| Tonbridge | 7 June 1956 | Gerald Williams | | Conservative | Richard Hornby | | Conservative | Resignation |
| Mid Ulster | 8 May 1956 | Charles Beattie | | UUP | George Forrest | | Ind. Unionist | Disqualification |
| Walthamstow West | 1 March 1956 | Clement Attlee | | Labour | Edward Redhead | | Labour | Elevation to a hereditary peerage |
| Taunton | 14 February 1956 | Henry Hopkinson | | Conservative | Edward du Cann | | Conservative | Elevation to a hereditary peerage |
| Gainsborough | 14 February 1956 | Harry Crookshank | | Conservative | Marcus Kimball | | Conservative | Elevation to a hereditary peerage |
| Hereford | 14 February 1956 | James Thomas | | Conservative | David Gibson-Watt | | Conservative | Elevation to a hereditary peerage |
| Leeds North East | 9 February 1956 | Osbert Peake | | Conservative | Sir Keith Joseph, Bt. | | Conservative | Elevation to a hereditary peerage |
| Blaydon | 2 February 1956 | William Whiteley | | Labour | Robert Woof | | Labour | Death |
| Torquay | 15 December 1955 | Charles Williams | | Conservative | Frederic Bennett | | Conservative | Death |
| Greenock | 8 December 1955 | Hector McNeil | | Labour | Dickson Mabon | | Labour | Death |
| Gateshead West | 7 December 1955 | John Hall | | Labour | Harry Randall | | Labour | Death |
| Mid Ulster | 11 August 1955 | Tom Mitchell | | Sinn Féin | Charles Beattie | | UUP | Disqualification |
| 1 2 3 Gain not retained at the 1959 general election. 1 2 Gain retained at the 1959 UK general election. 1 2 Tom Mitchell won the most votes in the 1955 general election but was disqualified by the House of Commons on the grounds that he was a convicted felon. A by-election was called at which Mitchell again stood and won the most votes. On this occasion an election petition was lodged and Mitchell was again disqualified with the Election Court declaring his opponent Charles Beattie duly elected. It was then discovered that Beattie was ineligible to sit because he held offices of profit under the Crown. Beattie was indemnified by Parliament against the consequences of sitting and voting while ineligible, and a further writ was moved. In the subsequent by-election Independent Unionist George Forrest gained more votes than Mitchell and duly took his seat. Subsequently Forrest took the Ulster Unionist whip and won the seat in his new party colours at the 1959 general election. 1951–1955 Parliament |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Wrexham | 17 March 1955 | Robert Richards | | Labour | Idwal Jones | | Labour | Death |
| Stockport South | 3 February 1955 | Arnold Gridley | | Conservative | Harold Steward | | Conservative | Elevation to a hereditary peerage |
| Edinburgh North | 27 January 1955 | James Clyde | | Conservative | William Rankine Milligan | | Conservative | Lord President, Court of Session |
| Twickenham | 25 January 1955 | Edward Keeling | | Conservative | Roger Gresham Cooke | | Conservative | Death |
| Orpington | 20 January 1955 | Waldron Smithers | | Conservative | Donald Sumner | | Conservative | Death |
| South Norfolk | 13 January 1955 | Peter Baker | | Conservative | John Hill | | Conservative | Expelled from the House (convicted of fraud) |
| Inverness | 21 December 1954 | Malcolm Douglas-Hamilton | | Conservative | Neil McLean | | Conservative | Resignation |
| Armagh | 20 November 1954 | James Harden | | UUP | Christopher Armstrong | | UUP | Resignation |
| Liverpool West Derby | 18 November 1954 | Sir David Maxwell Fyfe | | Conservative | John Woollam | | Conservative | Hereditary peerage on appointment as Lord High Chancellor of Great Britain |
| Morpeth | 4 November 1954 | Robert Taylor | | Labour | Will Owen | | Labour | Death |
| Sutton and Cheam | 4 November 1954 | Sydney Marshall | | Conservative | Richard Sharples | | Conservative | Resignation |
| Aberdare | 28 October 1954 | David Thomas | | Labour | Arthur Probert | | Labour | Death |
| Aldershot | 28 October 1954 | Oliver Lyttelton | | Conservative | Eric Errington | | Conservative | Elevation to a hereditary peerage |
| Wakefield | 21 October 1954 | Arthur Greenwood | | Labour | Arthur Creech Jones | | Labour | Death |
| Shoreditch and Finsbury | 21 October 1954 | Ernest Thurtle | | Labour | Victor Collins | | Labour | Death |
| Croydon East | 30 September 1954 | Herbert Williams | | Conservative | John Hughes-Hallett | | Conservative | Death |
| Motherwell | 14 April 1954 | Alexander Anderson | | Labour | George Lawson | | Labour | Death |
| Edinburgh East | 8 April 1954 | John Wheatley | | Labour | Eustace Willis | | Labour | Judge, Court of Session |
| Harrogate | 11 March 1954 | Christopher York | | Conservative | James Ramsden | | Conservative | Resignation |
| Arundel and Shoreham | 9 March 1954 | William Cuthbert | | Conservative | Henry Kerby | | Conservative | Resignation |
| Bournemouth West | 18 February 1954 | Viscount Cranborne | | Conservative | John Eden | | Conservative | Resignation |
| Harwich | 11 February 1954 | Stanley Holmes | | National Liberal and Conservative | Julian Ridsdale | | National Liberal and Conservative | Elevation to a hereditary peerage |
| Haltemprice | 11 February 1954 | Richard Law | | Conservative | Patrick Wall | | Conservative | Elevation to a hereditary peerage |
| Ilford North | 3 February 1954 | Geoffrey Hutchinson | | Conservative | Tom Iremonger | | Conservative | Chairman, National Assistance Board |
| Paddington North | 3 December 1953 | William J. Field | | Labour | Ben Parkin | | Labour | Resignation (scandal) |
| Holborn and St Pancras South | 19 November 1953 | Santo Jeger | | Labour | Lena Jeger | | Labour | Death |
| Ormskirk | 12 November 1953 | Arthur Salter | | Conservative | Douglas Glover | | Conservative | Elevation to a hereditary peerage |
| Crosby | 12 November 1953 | Malcolm Bullock | | Conservative | Graham Page | | Conservative | Resignation |
| Broxtowe | 17 September 1953 | Seymour Cocks | | Labour | William Warbey | | Labour | Death |
| Birmingham Edgbaston | 2 July 1953 | Peter Bennett | | Conservative | Edith Pitt | | Conservative | Elevation to a hereditary peerage |
| Abingdon | 30 June 1953 | Ralph Glyn | | Conservative | Airey Neave | | Conservative | Elevation to a hereditary peerage |
| Sunderland South | 13 May 1953 | Richard Ewart | | Labour | Paul Williams | | Conservative | Death |
| North Down | 15 April 1953 | Walter Smiles | | UUP | Patricia Ford | | UUP | Death (drowned in ferry disaster) |
| Hayes and Harlington | 1 April 1953 | Walter Ayles | | Labour | Arthur Skeffington | | Labour | Resignation |
| Stoke-on-Trent North | 31 March 1953 | Albert Davies | | Labour | Harriet Slater | | Labour | Death |
| Barnsley | 31 March 1953 | Sidney Schofield | | Labour | Roy Mason | | Labour | Resignation |
| Isle of Thanet | 12 March 1953 | Hon. Edward Carson | | Conservative | William Rees-Davies | | Conservative | Resignation |
| Canterbury | 12 February 1953 | John Baker White | | Conservative | Leslie Thomas | | Conservative | Resignation |
| Farnworth | 27 November 1952 | George Tomlinson | | Labour | Ernest Thornton | | Labour | Death |
| Birmingham Small Heath | 27 November 1952 | Fred Longden | | Labour | William Wheeldon | | Labour | Death |
| Belfast South | 4 November 1952 | Connolly Gage | | UUP | David Campbell | | UUP | Resignation |
| Wycombe | 4 November 1952 | Hon. William Astor | | Conservative | John Hall | | Conservative | Succession to the peerage |
| North Antrim | 27 October 1952 | Sir Hugh O'Neill | | UUP | Phelim O'Neill | | UUP | Resignation |
| Cleveland | 23 October 1952 | George Willey | | Labour | Arthur Palmer | | Labour | Death |
| Dundee East | 17 July 1952 | Thomas Cook | | Labour | George Thomson | | Labour | Death (road accident) |
| Leeds South East | 7 February 1952 | James Milner | | Labour | Denis Healey | | Labour | Elevation to a hereditary peerage |
| Southport | 6 February 1952 | Robert Hudson | | Conservative | Roger Fleetwood-Hesketh | | Conservative | Elevation to a hereditary peerage |
| Bournemouth East and Christchurch | 6 February 1952 | Brendan Bracken | | Conservative | Nigel Nicolson | | Conservative | Elevation to a hereditary peerage |
| 1 2 3 An uncontested by-election. ↑ The Armagh by-election was the last time to date when a UK Parliamentary election was uncontested. ↑ A rare occasion when an incumbent government gained a seat from the opposition in a by-election. The gain was held at the 1955 general election. 1950–1951 Parliament No seats changed hands during this Parliament. |||||||||
| By-election | Date | Incumbent | Party | Party | Winner | Party | Party | Cause |
| Westhoughton | 21 June 1951 | Rhys Davies | | Labour | Tom Price | | Labour | Illness |
| Woolwich East | 14 June 1951 | Ernest Bevin | | Labour | Christopher Mayhew | | Labour | Death |
| Londonderry | 19 May 1951 | Ronald Ross | | UUP | William Wellwood | | UUP | Appointment as Northern Ireland Government Agent in London |
| Harrow West | 21 April 1951 | Norman Bower | | Conservative | Albert Braithwaite | | Conservative | Resignation |
| Ormskirk | 5 April 1951 | Ronald Cross | | Conservative | Arthur Salter | | Conservative | Appointment as Governor of Tasmania |
| Bristol West | 15 February 1951 | Oliver Stanley | | Conservative | Walter Monckton | | Conservative | Death |
| Abertillery | 30 November 1950 | George Daggar | | Labour | Llywelyn Williams | | Labour | Death |
| Bristol South East | 30 November 1950 | Stafford Cripps | | Labour | Tony Benn | | Labour | Resignation (ill-health) |
| Belfast West | 29 November 1950 | James Godfrey MacManaway | | UUP | Thomas Teevan | | UUP | Disqualified |
| Birmingham Handsworth | 16 November 1950 | Harold Roberts | | Conservative | Edward Boyle | | Conservative | Death |
| Oxford | 2 November 1950 | Quintin Hogg | | Conservative | Lawrence Turner | | Conservative | Succession to the Peerage |
| Glasgow Scotstoun | 25 October 1950 | Sir Arthur Young, Bt | | Conservative | James Hutchison | | Conservative | Death |
| Leicester North East | 28 September 1950 | Terence Donovan | | Labour | Lynn Ungoed-Thomas | | Labour | Appointment as High Court Judge |
| Brighouse and Spenborough | 4 May 1950 | Frederick Cobb | | Labour | John Edwards | | Labour | Death |
| Dunbartonshire West | 25 April 1950 | Adam McKinlay | | Labour | Tom Steele | | Labour | Death |
| Sheffield Neepsend | 5 April 1950 | Harry Morris | | Labour | Frank Soskice | | Labour | Resignation to provide a seat for Solicitor General Frank Soskice |
| ↑ Uncontested by-election. ↑ MacManaway had been ordained a priest in the Church of Ireland in 1925. Before his candidature he sought legal advice and resigned all offices in the Church. However, after his election the Judicial Committee of the Privy Council determined him ineligible to sit, ruling that the House of Commons (Clergy Disqualification) Act 1801 disqualified him. |||||||||