57 registered parties representing 5 MPs in the current Parliament
Conservative and Unionist Party
Green Party
Labour Party
Reform UK
Scottish National Party (SNP)
Alba Party
Alliance For Green Socialism
Alliance - Alliance Party of Northern Ireland
Animal Welfare Party
Ashfield Independents
Aspire
Both Unions Party of Northern Ireland
British National Party
Christian Peoples Alliance
Climate Party
Co-operative Party
Common Good
Communist Party of Britain
Democratic Unionist Party - D.U.P.
English Democrats
Independent
Liberal Democrats
Life
Mebyon Kernow - The Party for Cornwall
Nork Residents' Association
One Leicester
People Before Profit
Plaid Cymru - The Party of Wales
Propel
Rejoin EU
Renew
Scottish Family Party
Scottish Green Party
Scottish Socialist Party
Sinn Féin
Social Democratic and Labour Party
Social Democratic Party
Socialist Labour Party
Speaker
The Liberal Party
The Official Monster Raving Loony Party
The Peace Party - Non-violence, Justice, Environment
The Reclaim Party
The Socialist Party of Great Britain
Trade Unionist and Socialist Coalition
Traditional Unionist Voice - TUV
Transform Party
UK Independence Party (UKIP)
Ulster Unionist Party
Upminster and Cranham Residents Association
Workers Party of Britain
Yes 2 Europe
Yorkshire Party
Current Parliament