Every single political party that have at least one seat in the UK parliament. This excludes Independents. Your given the leader and work out the party.
I will accept conservative but the full name is the Liberal Democrats. The challenge of the quiz is to name the proper name. Hence the reason it is down as the Independent Group for Change. I will accept Change UK however
'green' should be allowed without party, none of the others require you to say party. also might be worth covering yourself by adding a disclaimer in the instructions saying when this was last updated.
In terms of the last updated, JetPunk actually offers that as a feature so there’s no need to include it in the description. Cheers for the feedback!