United Kingdom

House of Commons

Party discipline — House of Commons

Which parties hold together, and which vote together — over the last 50 genuine roll-call votes. Cohesion is the Rice index (how unanimous a party is); agreement is how often two parties' majorities matched.

Party cohesion

How unanimously each party votes (1 = everyone together).

Democratic Unionist Party100%3 v

Labour100%3 v

Labour (Co-op)100%3 v

Conservative100%2 v

Reform UK100%2 v

Liberal Democrat100%2 v

Your Party100%2 v

Green Party100%2 v

Ulster Unionist Party100%2 v

Social Democratic & Labour Party100%1 v

Plaid Cymru100%1 v

Traditional Unionist Voice100%1 v

Independent51%3 v

Party agreement

How often two parties' for/against majorities matched. Darker = more aligned.

	Democratic Unionist Party	Labour	Labour (Co-op)	Conservative	Reform UK	Liberal Democrat	Your Party	Green Party	Ulster Unionist Party	Social Democratic & Labour Party	Plaid Cymru	Traditional Unionist Voice	Independent
Democratic Unionist Party	100	33	33	50	100	100	50	50	50	0	100	100	67
Labour	33	100	100	0	50	0	100	100	0	100	100	100	67
Labour (Co-op)	33	100	100	0	50	0	100	100	0	100	100	100	67
Conservative	50	0	0	100	50	100	0	0	100	0	0	0	50
Reform UK	100	50	50	50	100	100	50	50	50	0	100	100	100
Liberal Democrat	100	0	0	100	100	100	0	0	100	0	—	—	50
Your Party	50	100	100	0	50	0	100	100	0	100	100	100	50
Green Party	50	100	100	0	50	0	100	100	0	100	100	100	50
Ulster Unionist Party	50	0	0	100	50	100	0	0	100	0	0	0	50
Social Democratic & Labour Party	0	100	100	0	0	0	100	100	0	100	—	—	0
Plaid Cymru	100	100	100	0	100	—	100	100	0	—	100	100	100
Traditional Unionist Voice	100	100	100	0	100	—	100	100	0	—	100	100	100
Independent	67	67	67	50	100	50	50	50	50	0	100	100	100

Cohesion uses the Rice index |for − against| / (for + against), averaged over votes where the party cast for/against ballots. Agreement counts only votes where both parties had a clear majority. Independents (no party) and votes recorded only at party level are excluded. Source: developer.parliament.uk (Open Government Licence v3).