Labour Party has won the UK general election
The result ends 14 years of Conservative government, which has seen five different prime ministers running the country.
Rishi Sunak, the outgoing PM, conceded at around 04:40 in the morning, acknowledging Labour had won and saying that he had called Sir Keir to congratulate him.
In his victory speech, the Labour leader promised "national renewal" and "country first, party second.
The former chief prosecutor and human rights lawyer has reason to be happy - his party is on track to win a huge majority in Parliament.
Robert Buckland, a former Conservative minister who lost his seat, described it as "electoral Armageddon" for Mr Sunak's party.
It's been a long night of results and there's plenty more action to come. Here's what's happening, and what it means.
Britain's House of Commons has 650 MPs, or members of parliament. Each of these represents an individual constituency - or area – somewhere in the country.
Our latest BBC forecast puts Labour on 410 seats, the Conservatives on 144 and centrist Lib Dems on 58. Reform, a successor to the Brexit Party, meanwhile were downgraded from an initially projected 13 seats to four.
The latest forecast of a 170-seat majority in the House of Commons for Labour is an enormous number but would still be short of the majority of 179 won by the party under Tony Blair in the 1997 election.
But for more perspective, Boris Johnson's victory in the 2019 election won his Conservatives a majority of 80 seats.
As constituencies have declared their results live on television, with all candidates on stage, there have already been some major moments.
Jacob Rees-Mogg, the former minister of state for Brexit opportunities under Boris Johnson, lost his seat.
Grant Shapps, the defence secretary, looked rattled after losing his seat in southern England.
Leader of the House Penny Mordaunt, who ran against Rishi Sunak for the party leadership before he became prime minister, also lost her seat.
Jeremy Hunt, who serves as chancellor - the UK equivalent of a finance minister - held on to his seat but with a much-reduced majority.
Mr Sunak also won his seat in Yorkshire with a comfortable majority of around 12,000 - but used his acceptance speech to concede and confirm his party had lost the election.
But hold tight, we're still waiting for the results in some other big contests.
Liz Truss, who was prime minister for less than two months between Boris Johnson and Rishi Sunak, faces a tough battle in her South West Norfolk constituency.
Things move pretty fast in British politics - there is very little time between an election result and the installation of the new prime minister.
Rishi Sunak will be out of 10 Downing Street - the British equivalent of the White House - within 24 hours, and Sir Keir Starmer will be installed swiftly afterwards.
But there is a process. Mr Sunak will offer his resignation to the King, and Sir Keir will formally invited by the monarch to form the next government in a meeting that normally happens at Buckingham Palace.
BBC
