Election Previews and Target Wards
For every council's next elections: which wards each party needs, and where control would change hands.
When a ward votes next: Four years after its last scheduled election.
Share and majority: Each party's best candidate's votes as a share of all parties' best-candidate votes. Majority is the winner's share minus the runner-up's.
Swing needed: Half the gap between the winner's share and the party's share.
Majority line: Seats for a majority (more than half the council) minus the party's current seats, counted down the ladder.
