There are 11 mayors being elected.
There are contests for London mayor, nine Combined Authority mayors and for Salford City mayor.
Ballots are now closed and votes are being counted.
We can expect to start getting the first results in from Friday lunchtime, starting with the closely fought battle for Tees Valley mayor and continuing until around 4.30pm.
Announcements start up again on Saturday, beginning with the Liverpool City Region at around midday, and running through until around 10pm for results of the London mayor race.
Below are the contests in order of when they are expected to declare results. Some are newly created mayoralties voting for the first time.
- Tees Valley, results expected Friday at around 12.30pm
- East Midlands, inaugural election, results expected Friday at around 1.30pm
- York and North Yorkshire, inaugural election, results expected Friday at around 4pm
- North East, inaugural election, results expected Friday at around 16:30pm
- Liverpool City Region, results expected Saturday at around 12pm
- South Yorkshire, results expected Saturday at around 1pm
- Greater Manchester, results expected Saturday at around 2pm
- West Midlands, results expected Saturday at around 2.15pm
- West Yorkshire, results expected Saturday at around 3.30pm
- Salford, results expected Saturday at around 7pm
- London, results expected Saturday at around 10pm
This year's mayoral elections are being conducted under the first past the post electoral system for the first time.
The map below shows which mayoral candidates have won in their area by political party and will fill in as results are declared.
See below for more detailed breakdowns of results for each race as they come in.
Electors are across the Greater London area.
The authority includes Darlington, Hartlepool, Middlesbrough, Redcar & Cleveland and Stockton-on-Tees local council areas.
The jurisdiction includes Birmingham, Coventry, Dudley, Sandwell, Solihull, Walsall and Wolverhampton metropolitan districts.
The area covered includes Derbyshire and Nottinghamshire counties and the unitary council areas of Derby and Nottingham.
The authority includes Bolton, Bury, Manchester, Oldham, Rochdale, Salford, Stockport, Tameside, Trafford and Wigan local council areas.
Local council areas included are Halton, Knowsley, Liverpool, St Helens, Sefton, and Wirral.
The jurisdiction includes the metropolitan boroughs of Gateshead, Newcastle-upon-Tyne, North Tyneside, South Tyneside and Sunderland as well as the Northumberland and Durham unitary councils.
The area includes Barnsley, Doncaster, Rotherham and Sheffield boroughs.
The area comprises the metropolitan boroughs of Bradford, Calderdale, Kirklees, Leeds and Wakefield.
This jurisdiction includes the two unitary councils of North Yorkshire and York City.
Salford City is also part of Greater Manchester Combined Authority, so people there will be voting in two races.
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