David Cameron says he hopes to govern for all of the UK as a BBC forecast gives the Tories 329 seats - enough to form a slender majority in the Commons.

The prime minister said it was "too early to say" the final result but he hoped to form a government.

Labour has been all but wiped out by the SNP in Scotland and is failing to make enough gains in England and Wales.

The Lib Dems are heading for as few as eight MPs, with Vince Cable, Ed Davey and Danny Alexander losing their seats.

The BBC forecast, with well over half of the results now in, is Conservative 329, Labour 233, the Lib Dems eight, the SNP 56, Plaid Cymru three, UKIP two, the Greens one and others 19.

In other election developments: