David Cameron misrepresented polling data to claim popular support for redefining marriage, the ComRes chief has said.

Andrew Hawkins, Chairman of the polling company, wrote to David Cameron to “put the record straight” about the number of people who are in favour of the Government’s plans to redefine marriage.

The Prime Minister had responded to a letter from MP Cheryl Gillan, in which she criticised the proposals. He said that more Tory-leaning voters were in favour of same-sex marriage than were put off by it.

But Andrew Hawkins said his polling showed that redefining marriage was unlikely to win back support from disillusioned voters.

He also said it was “simply not the case” that all the published polls show more voters are in favour of same-sex marriage, something the Prime Minister asserted as fact in his letter.

Mr Hawkins said the level of agreement that marriage should stay as it is, varies between 55% and over 70%.