| Radicals |
R |
|
| Referendum Party |
Ref |
Formed 1994. Dissolved 1997. MNIS Party ID 24. |
| Reform UK |
RUK |
Formed 23 November 2018. Registered 5 February 2019. Formerly known as The Brexit Party (until 6 January 2021). MNIS Party ID 1036. Electoral Commission ID PP7931. |
| Republican Labour Party |
RLP |
Formed 1964. Dissolved 1973. Preceded by the Socialist Republican Party and the Irish Labour Party. MNIS Party ID 25. |
| Respect Party |
Res |
Formed 25 January 2004. Registered 27 February 2004. Dissolved 18 August 2016. MNIS Party ID 26. Electoral Commission ID PP362. |