SV

• Supplementary Vote is used in the Uk Mayor Elections, the Police and Crime Commissioners and for the Mayor of London elections.
• The Supplementary Vote is a majoritarian voting system. This system was first devised in the 1990s and is an alternative to systems that eliminate candidates in different rounds and through holding multiple separate ballots.
• The Supplementary Vote system was used in elections for most directly-elected mayors. For example, it was used for the election of the Mayor of London. From 2012-2021 it was also been used in the election of Police and Crime Commissioners.
• Under SV there is one ballot paper and voters cast two votes in order of preference.
• One of the main benefits of SV is that under it the winning candidate can claim to have a clearer mandate than under FPTP. This is because in the second round over 50% of votes that are counted must got to the winning candidate.