Set up a by-election

Choose a Westminster constituency and configure the assumptions for your simulated election.

Election details

UK Parliament only · not devolved or local government

Election namePolling date

Find a Westminster constituency

Nation

Selected constituency

4 seats available · four built-in historical profiles

Failed to fetch Four built-in profiles and custom constituencies remain available.

Reason for vacancyCampaign duration (days)Expected turnout (%)Campaign control

Fictional candidates · percentages are normalised by the voter model

Add more parties, independents and detailed candidate attributes in Candidates after starting the scenario.