# List of Social Democratic Party (UK) MPs

This is a list of Social Democratic Party MPs. It includes all members of Parliament elected to the British House of Commons representing the Social Democratic Party. Members of the European Parliament are not listed.
Bruce Douglas-Mann, Labour Party MP for Mitcham and Morden, is not included as immediately on his change of allegiance he stood down, forcing a by-election, which he lost.
| Member | Constituency | Years served |
| Rosie Barnes | Greenwich | 1987 – 1988 $^1$ |
| Tom Bradley | Leicester East | 1981 – 1983 $^2$ |
| Christopher Brocklebank-Fowler | North West Norfolk | 1981 – 1983 $^3$ |
| Ronald Brown | Hackney South and Shoreditch | 1981 – 1983 $^2$ |
| John Cartwright | Woolwich East | 1981 – 1983 $^2$ |
| John Cartwright | Woolwich | 1983 – 1988 $^1$ |
| Richard Crawshaw | Liverpool Toxteth | 1981 – 1983 $^2$ |
| George Cunningham | Islington South and Finsbury | 1981 – 1983 $^2$ |
| Ednyfed Hudson Davies | Caerphilly | 1981 – 1983 $^2$ |
| James Dunn | Liverpool Kirkdale | 1981 – 1983 $^2$ |
| Tom Ellis | Wrexham | 1981 – 1983 $^2$ |
| David Ginsburg | Dewsbury | 1981 – 1983 $^2$ |
| John Grant | Islington Central | 1981 – 1983 $^2$ |
| Mike Hancock | Portsmouth South | 1984 – 1987 $^4$ |
| John Horam | Gateshead West | 1981 – 1983 $^{2,5}$ |
| Roy Jenkins | Glasgow Hillhead | 1982 – 1987 $^6$ |
| Charles Kennedy | Ross, Cromarty and Skye | 1983 – 1988 $^7$ |
| Edward Lyons | Bradford West | 1981 – 1983 $^2$ |
| Dickson Mabon | Greenock and Port Glasgow | 1981 – 1983 $^2$ |
| Robert Maclennan | Caithness and Sutherland | 1981 ––1988 $^{2,7}$ |
| Bryan Magee | Leyton | 1982 – 1983 $^2$ |
| Thomas McNally | Stockport South | 1981 – 1983 $^2$ |
| Bob Mitchell | Southampton Itchen | 1981 – 1983 $^2$ |
| Michael O'Halloran | Islington North | 1981 –1983 $^{2,8}$ |
| Eric Ogden | Liverpool West Derby | 1981 – 1983 $^2$ |
| David Owen | Plymouth Devonport | 1981 – 1988 $^{1,2}$ |
| William Rodgers | Stockton-on-Tees | 1981 – 1983 $^2$ |
| John Roper | Farnworth | 1981 – 1983 $^2$ |
| Neville Sandelson | Hayes and Harlington | 1981 – 1983 $^2$ |
| Jeffrey Thomas | Abertillery | 1981 – 1983 $^2$ |
| Mike Thomas | Newcastle upon Tyne East | 1981 – 1983 $^2$ |
| James Wellbeloved | Erith and Crayford | 1981 – 1983 $^2$ |
| Shirley Williams | Crosby | 1981 – 1983 $^6$ |
| Ian Wrigglesworth | Thornaby | 1981 – 1983 |
| Ian Wrigglesworth | Stockton South | 1983 – 1987 $^2$ |
    $^1$ Joined David Owen's Social Democratic Party in 1988, then became an Independent Social Democrat MP from 1990 - 92.
    $^2$ Sitting Labour Party MP who joined the SDP.
    $^3$ Sitting Conservative Party MP who joined the SDP.
    $^4$ Later elected as a Liberal Democrat MP.
    $^5$ Later elected as a Conservative MP.
    $^6$ Previously elected as a Labour MP.
    $^7$ Joined the Liberal Democrats on their formation in 1988.
    $^8$ Subsequently left the SDP to sit as an independent Labour MP.

## Graphical representation (1981-88)

Also includes the continuing SDP from 1988.
| Constituency | 1981 | 81 | 82 | 83 | 1983 | 84 | 87 | 1987 | 88 |
| Plymouth Devonport | Owen | Owen | Owen | Owen | Owen | Owen | Owen | Owen | Owen |
| Woolwich East / Woolwich (1983) | Cartwright | Cartwright | Cartwright | Cartwright | Cartwright | Cartwright | Cartwright | Cartwright | Cartwright |
| Caithness and Sutherland | Maclennan | Maclennan | Maclennan | Maclennan | Maclennan | Maclennan | Maclennan | Maclennan | |
| Thornaby / Stockton South (1983) | Wrigglesworth | Wrigglesworth | Wrigglesworth | Wrigglesworth | Wrigglesworth | Wrigglesworth | Wrigglesworth | | |
| Greenock & Port Glasgow | Mabon | Mabon | Mabon | Mabon | | | | | |
| Stockport South | McNally | McNally | McNally | McNally | | | | | |
| Gateshead West | Horam | Horam | Horam | Horam | | | | | |
| Stockton-on-Tees | Rodgers | Rodgers | Rodgers | Rodgers | | | | | |
| Southampton Itchen | Mitchell | Mitchell | Mitchell | Mitchell | | | | | |
| Farnworth | Roper | Roper | Roper | Roper | | | | | |
| Liverpool Kirkdale | Dunn | Dunn | Dunn | Dunn | | | | | |
| Liverpool Toxteth | Crawshaw | Crawshaw | Crawshaw | Crawshaw | | | | | |
| Liverpool West Derby | Ogden | Ogden | Ogden | Ogden | | | | | |
| Leicester East | Bradley | Bradley | Bradley | Bradley | | | | | |
| Hayes and Harlington | Sandelson | Sandelson | Sandelson | Sandelson | | | | | |
| Hackney S & Shoreditch | Brown | Brown | Brown | Brown | | | | | |
| Islington Central | Grant | Grant | Grant | Grant | | | | | |
| Erith and Crayford | Wellbeloved | Wellbeloved | Wellbeloved | Wellbeloved | | | | | |
| North West Norfolk | Brocklebank-Fowler | Brocklebank-Fowler | Brocklebank-Fowler | Brocklebank-Fowler | | | | | |
| Newcastle upon Tyne East | M. Thomas | M. Thomas | M. Thomas | M. Thomas | | | | | |
| Bradford W | Lyons | Lyons | Lyons | Lyons | | | | | |
| Dewsbury | Ginsburg | Ginsburg | Ginsburg | Ginsburg | | | | | |
| Wrexham | Ellis | Ellis | Ellis | Ellis | | | | | |
| Abertillery | J. Thomas | J. Thomas | J. Thomas | J. Thomas | | | | | |
| Caerphilly | Davies | Davies | Davies | Davies | | | | | |
| Islington North | O'Halloran | O'Halloran | O'Halloran | | | | | | |
| Crosby | | Williams | Williams | Williams | | | | | |
| Islington S & Finsbury | | | Cunningham | Cunningham | | | | | |
| Leyton | | | Magee | Magee | | | | | |
| Glasgow Hillhead | | | Jenkins | Jenkins | Jenkins | Jenkins | Jenkins | | |
| Ross, Cromarty and Skye | | | | | Kennedy | Kennedy | Kennedy | Kennedy | |
| Portsmouth South | | | | | | Hancock | Hancock | | |
| Greenwich | | | | | | | Barnes | Barnes | Barnes |
| Constituency | 1981 | 81 | 82 | 83 | 1983 | 84 | 87 | 1987 | 88 |
| No. of SDP MPs | 26 | 27 | 30 | 29 | 6 | 7 | 8 | 5 | 3 |