Seven out of 10 people who supported the Liberal Democrats in the 2010 election say the party has abandoned too many of its principles since joining forces with the Conservatives, a survey of voters has found.

More than half of those who voted for Deputy Prime Minister Nick Clegg’s party say it has almost no influence on government policy, while only two in five say they would vote for the Liberal Democrats again, according to a survey by ComRes on behalf of The Independent newspaper.