| New Party |
New Party |
|
| No2EU |
|
Formed for the 2009 EU elections; also contested the 2014 EU elections. |
| Northern Party |
|
Founded 1 April 2015; voluntarily deregistered 8 April 2016. |
| Official Monster Raving Loony Party |
OMRLP |
|
| Official Unionist Party |
OUP |
|
| Plaid Cymru |
PC |
|
| Protestant Unionist Party |
PUP |
Founded 1966. Dissolved 1971. |
| Referendum Party |
Referendum |
|
| Republican Labour |
Rep. Lab |
|
| Respect |
Respect |
|
| Scottish Labour Party |
Scot. Lab. |
Founded 1976 |
| Scottish National Party |
SNP |
formerly named as Sottish Nationalist Party |
| Scottish Parliamentary Labour Party |
SPLP |
|
| Scottish Prohibition Party |
SPP |
|
| Scottish Workers' Representation Committee |
SWRC |
|
| Sinn Fein |
Sinn Fein |
|
| Social Democratic Federation |
SDF |
|
| Social Democratic & Labour Party |
SDLP |
|
| Social Democratic Party |
SDP |
Founded 1981, merged with Liberal Party 1988. |
| Socialist |
Socialist |
|