Reform UK has been the big winner overnight, picking up hundreds of seats and control of a council in elections around England.
Labour has lost hundreds of councillors and control of eight councils.
Votes in 46 council areas were being counted overnight, with a further 90 due to declare throughout Friday and into Saturday.
Elections have also been held for Welsh and Scottish Parliaments, plus six mayors in London and Watford. Counting for those will take place later on Friday.
Check what’s happening where you live using our interactive tool and your postcode.
As you can see in the chart below, Labour has lost control of several councils, most of them going to no overall control.
Reform UK and the Liberal Democrats have each gained one council, while the Conservatives have lost one council and gained another.
The Green party of England and Wales has gained more than 20 seats.
Its gains in Hartlepool were enough to strip Labour of its majority and leave both parties with 15 councillors each.
The Liberal Democrats took full control of Stockport Council, having successfully defended 11 seats and added two more.
In some areas that Labour held on to, its majority was already secure before voters went to the polling stations. The party lost all 22 of the seats it was defending in Wigan to Reform UK, but still controls the council because only a third of seats were up for election.
Labour also saw losses in other north-west councils including Chorley, Halton and Salford, where its majorities were already safe.
Exeter showed how Labour could lose seats both to the Greens and Reform UK, while the Conservatives lost a seat to the Lib Dems.
There were more than 5,000 councillors up for election across 136 councils in England on Thursday, standing for a mixture of district, metropolitan, unitary and county councils as well as all London boroughs.
Labour were defending the most seats with more than 2,500, the Conservatives over 1,300, the Lib Dems just under 700 and the Greens just under 150.
Most of the seats were last contested in 2022, at a time when Reform UK stood in very few areas. That means it stood to gain the most of all the parties.
The map below shows how it has picked up seats across England among the councils that were counting votes overnight.
Use the tabs to see the other parties.
Many of the councils that were counting results overnight only elect one third of councillors at a time, making it harder for Reform UK to take overall control.
Similarly, many of the councils where the Greens stand to make the most gains are among those counting votes later on Friday.
The map below shows where parties have made their biggest losses so far in England.
The overnight results show heavy losses for Labour in the north-west and east of England. The Conservatives have also lost dozens of seats in the east and Midlands.
The majority of results are still to come, including for the elections to the Scottish and Welsh parliaments.
In Scotland, all 129 seats were up for election.
The largest party before the election was the Scottish National Party led by John Swinney.
The last election was in 2021 when the SNP fell one seat short of a majority.
The Welsh Parliament is expanding from 60 to 96 seats and a new electoral system has been introduced.
The boundaries have changed too. The old constituencies and regions have been replaced with 16 new constituencies, each electing six members using a system of proportional representation.
Labour held half of the seats after the last election in 2021.
Interactive tool produced by Wesley Stephenson, Jess Carr, Allison Shultes, Steven Connor, Scott Jarvis and Chris Kay.
Reporting and visualisations by Aidan McNamee, Daniel Wainwright, Christine Jeavans and Becky Dale.