London, May 8 (RHC-Xinhua) -- The Conservatives won an outright majority in Britain's 2015 General Elections by getting 331 seats out of the total 650 seats in the House of Commons, according to the final results released Friday.

According to a Xinhua news agency report, leaders of three British parties, including the Labour Party, the Liberal Democrats Party and the UK Independence Party, Friday announced their resignation as the parties' leaders after defeats in the election.

The Labour, Scottish National Party (SNP), Lib Dems and UKIP have got 232 seats, 56 seats, eight seats and one seat respectively.

Earlier in the day, David Cameron, British Prime Minister and leader of the Conservative Party, who has secured his second term as British prime minister, also confirmed his promise to launch an in-out European Union referendum.