Conservative candidate for Chingford and Woodford Green Iain Duncan Smith awaits results for Britain's general election in Waltham Forest Town Hall, Walthamstow, Britain, December 13, 2019.

A staff member carries a ballot box at a counting centre during Britain's general election, Bath, Britain December 12, 2019.

Britain's opposition Labour Party leader Jeremy Corbyn waits for the General Election results of the Islington North constituency to be announced at a counting centre in Islington during Britain's general election, London, Britain December 13, 2019.

Conservatives' British Prime Minister Boris Johnson gestures while speaking after winning his seat at the counting centre in Britain's general election in Uxbridge, Britain, December 13, 2019.

Liberal Democrats candidate Jo Swinson speaks after losing her seat in East Dunbartonshire constituency, at a counting centre for Britain's general election in Bishopbriggs, Britain December 13, 2019.

Britain's opposition Labour Party leader Jeremy Corbyn leaves the Labour Party's headquarters following the general election in London, Britain December 13, 2019.

Leader of the Scottish National Party Nicola Sturgeon cheers with supporters at a counting centre for Britain's general election in Glasgow, Britain, December 13, 2019.

Britain's Prime Minister Boris Johnson reacts as he and his girlfriend Carrie Symonds arrive at the Conservative Party's headquarters following the general election in London, Britain December 13, 2019.

A woman walks outside of a polling station during the general election in London, Britain, December 12, 2019.

Leader of the Scottish National Party Nicola Sturgeon poses with supporters at a counting centre for Britain's general election in Glasgow, Britain, December 13, 2019.

Labour candidate Faiza Shaheen for Chingford and Woodford Green reacts after losing in Britain's general election in Waltham Forest Town Hall, Walthamstow, Britain, December 13, 2019.

Carrie Symonds, partner of British Prime Minister Boris Johnson, holds their dog Dilyn at the counting centre in Britain's general election in Uxbridge, Britain, December 13, 2019.

The election result (predicted) is projected onto Broadcasting House in London, Britain, December 13, 2019. Jeff Overs/BBC/Handout via REUTERS.

Britain's opposition Labour Party leader Jeremy Corbyn reacts after the General Election results of the Islington North constituency were announced at a counting centre in Islington during Britain's general election, London, Britain December 13, 2019.

Britain's Prime Minister Boris Johnson holds his dog Dilyn as he leaves a polling station, at the Methodist Central Hall, after voting in the general election in London, Britain, December 12, 2019.

Brexit Party candidate Richard Tice is seen after Labour Party candidate Mike Hill is announced as the winner for the constituency of Hartlepool at a counting centre for Britain's general election in Hartlepool, Britain, December 13, 2019.

Conservatives' British Prime Minister Boris Johnson looks on after winning his seat of Uxbridge and South Ruislip at the counting centre in Britain's general election in Uxbridge, Britain, December 13, 2019.

Britain's Prime Minister Boris Johnson attends a Conservative Party event following the results of the general election in London, Britain, December 13, 2019.

An election worker adjusts a sign on a polling station in a container outside The Olympian Boxing Club during the general election in Sunderland, Britain, December 12, 2019.

Labour candidate for Walthamstow Stella Creasy carries her baby daughter after winning in Britain's general election in Waltham Forest Town Hall, Walthamstow, Britain, December 13, 2019.

Liberal Democrats candidate Monica Harding looks on as Conservative Party candidate Dominic Raab (R) speaks after he was announced as the winner for the constituency of Esher and Walton at a counting centre for Britain's general election in Esher, Britain December 13, 2019.

British Prime Minister Boris Johnson and Carrie Symonds arrive at the counting centre in Britain's general election in Uxbridge, Britain, December 13, 2019.

Britain's Prime Minister Boris Johnson leaves the Conservative Party's headquarters following the general election in London, Britain December 13, 2019.

Britain's Prime Minister Boris Johnson waves as he arrives at Downing Street after meeting with the Queen at the Buckingham Palace to ask for permission to form a government, in London, Britain, December 13, 2019.

Ballots are tallied at a counting centre for Britain's general election in Wakefield, Britain, December 12, 2019. Image for illustrative purposes.

Liberal Democrats candidate Wera Hobhouse celebrates winning the constituency of Bath at a counting centre during Britain's general election in Bath, Britain December 13, 2019.

Sinn Fein's John Finucane, the winning candidate in the Belfast North seat, with Party Vice President Michelle O'Neill and President Mary Lou McDonald, celebrates at the count centre, Titanic Quarter, Belfast, Northern Ireland December 13, 2019.

Ballots are tallied at a counting centre for Britain's general election in Waltham Forest Town Hall, Walthamstow, Britain, December 12, 2019. Image for illustrative purpose.

A dog is pictured next to a sign at the gate of a polling station in Stamford Hill during the general election in London, Britain, December 12, 2019.

Scottish National Party (SNP) supporters cheer at a counting centre for Britain's general election in Glasgow, Britain, December 13, 2019.

Arlene Foster, Leader of the DUP, arrives at the count centre, Titanic Quarter, Belfast, Northern Ireland December 13, 2019.

Britain’s Leader of the House of Commons Jacob Rees-Mogg, his wife Helena and son Peter react at a counting centre during Britain's general election, Bath, Britain December 13, 2019.

Labour Party supporters react at a counting centre for Britain's general election in Glasgow, Britain, December 13, 2019.

Britain's Prime Minister Boris Johnson and his girlfriend Carrie Symonds leave the Conservative Party's headquarters with their dog Dilyn following the general election in London, Britain December 13, 2019.

Britain's Prime Minister Boris Johnson arrives at Downing Street after meeting with the Queen at the Buckingham Palace to ask for permission to form a government, in London, Britain, December 13, 2019.

Britain's Prime Minister Boris Johnson leaves Downing Street for Buckingham Palace after the Conservative Party was returned to power in the general election with an increased majority, in London, Britain December 13, 2019. Victoria Jones/Pool via REUTERS.

Liberal Democrats candidate Jo Swinson speaks after losing her seat in East Dunbartonshire constituency, at a counting centre for Britain's general election in Bishopbriggs, Britain December 13, 2019.