| The Brexit Party |
BRX |
Formed 23 November 2018. Registered 5 February 2019. Later known as Reform UK (from 6 January 2021). MNIS Party ID 1006. Electoral Commission ID PP7931. |
| The Northern Party |
NorP |
Formed 2015. Registered 01 April 2015. Dissolved 8 April 2016. MNIS Party ID 180. Electoral Commission ID PP2664. |
| The Reclaim Party |
RP |
Registered 13/03/2019. Formerly known as The Brexit Party (before 6 January 2021). MNIS Party ID 1043. Electoral Commission ID PP9050. |
| Trade Unionist and Socialist Coalition |
TUSC |
Formed January 2010. Registered 27 January 2010. MNIS Party ID 157. Electoral Commission ID PP804. |
| Traditional Unionist Voice |
TUV |
Formed 10 October 20007. Registered 10 October 2007. MNIS Party ID 158. Electoral Commission ID PP680. |