UK election: Theresa May could lose parliamentary majority, exit poll shows

British Prime Minister Theresa May's Conservative Party appears on course to lose her parliamentary majority in the UK general election, according to an exit poll compiled for the UK's main television broadcasters.

The shock poll suggests the Conservatives will secure only 314 of the 650 seats in the House of Commons, the lower house of the UK's Parliament. The main opposition Labour party are tipped to win 266 seats.

In Britain's Parliamentary system, if a party wins 326 seats in the House of Commons, its leader becomes prime minister and can form a government.