The London mayor is chosen by supplementary vote. If no candidate gets 50% of the votes, second preferences are used.
|Lib Dem||Caroline Pidgeon||120,005||4.6%|
In London voters choose an assembly member for a constituency (typically two neighbouring boroughs) and cast another vote for London-wide top-up seats, which favour parties who were under-represented at a constituency level.
Voters in Scotland elect an MSP in 73 constituencies, plus top-up MSPs in eight regions, to a total of 129. The regional seats are awarded taking into account the constituency results in a way which compensates parties with a strong regional vote who did not get many constituency seats. In the outgoing parliament, Nicola Sturgeon's SNP had a five-seat majority.
There are elections in 124 English councils, from Carlisle to Plymouth. Some are electing all councillors, while others are voting in a third or a half of seats.
Voters in Wales elect an AM in 40 constituencies, plus top-up AMs in five regions, to a total of 60. The regional seats are awarded taking into account the constituency results in a way which compensates parties with a strong regional vote who did not get many constituency seats. In the last assembly, Labour had exactly half of the seats, and Carwyn Jones led a minority government as first minister.
Sadiq Khan, Labour Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.
Voters in Northern Ireland choose representatives at the Stormont Assembly for the same 18 constituencies which return Westminster MPs, but with a different voting system. Six members are returned by each constituency by single transferable vote, a form of proportional representation. Uniquely in the UK, ministries are reserved for any large party, meaning power-sharing is usually guaranteed.