The electoral landscape of Britain
In May, all 33 English County and Unitary Councils are up for election.
The DUP (28 seats) and Sinn Féin (27 seats) emerged from the 2017 elections as the two largest parties. Turnout was 64.8%.
Of the 124 English Councils with elections in May, the Labour Party hold 58 councils, Conservatives 40, and 23 have No Overall Control.
In May 2016, the Scottish National Party won 63 seats, a drop of six and short of an overall majority.
In five London Mayor elections to date, two have been won by Boris Johnson (Conservative), two by Ken Livingstone (Independent/ Labour), and now Sadiq Khan(Labour).
The Labour Party held steady as the largest party in the Assembly with 12 seats.
In May 2016 the Labour Party won 29 seats, a loss of one and just short of a majority in the Assembly.
The DUP (38 seats) and Sinn Féin (29 seats) emerged from the 2016 elections as the two largest parties.
The parties enter the 2016 elections with the Conservative Party holding 16 Police Commissioners and Labour holding 13.
In 2016 the Labour party won all three mayoral contests in Liverpool, Bristol and Salford, gaining Bristol.
In May 2015, the Conservative party gained 24 seats and won a clear majority of 12
UKIP won 24 seats, making them the biggest party nationally for the first time
Of the 33 English County and Unitary Councils with elections in May, the Labour Party hold 3 councils, Conservatives 16, and 14 have No Overall Control.
In 2012, the first PCC elections, the Conservative Party won most Police Commissioners with 16. Labour won 13, with 11 Independents.
In 2012, Boris Johnson of the Conservative Party was elected Mayor with 51.5% in the second round of voting, with Labour’s Ken Livingstone in second place.
In 2012, the Labour Party were the largest party in the Assembly with 12 seats, a gain of 4.
Of the 32 Scottish Councils with elections in May, the Labour Party hold 4 councils, SNP 2, Independents 3, and 23 have No Overall Control.
In 2012 the newly elected mayors of Liverpool, Bristol and Salford were won by 2 Labour Party and 1 Independent candidate.
Of the 21 Welsh Councils with elections in May, the Labour Party hold 10 councils, Independents 2, and 9 have No Overall Control.
The Labour Party go into the 2016 elections with 30 seats, exactly half of the Assembly.