The 2016 United Kingdom local elections held on Thursday 5 May 2016 were a series of local elections which were held in 124 local councils and also saw 4 mayoral elections in England which also coincided with elections to the Scottish Parliament, the Welsh Assembly, the Northern Ireland Assembly, the London Assembly, the London mayoral election and the England and Wales Police and crime commissioners. By-elections for the Westminster seats of Ogmore and Sheffield Brightside and Hillsborough were also held. These proved to be David Cameron's last local elections as leader of the Conservative Party and Prime Minister as he resigned two months later following the defeat of Remain in the referendum on Britain's continuing membership of the European Union which was held seven weeks later.