Across the country Tory constituency chairmen, officials and councillors have said in interviews they are in favour of Brexit, which will cause a significant problem for the Prime Minister.
Of 68 constituency parties contacted in a major study, only two said a majority of members were in favour of remaining in the European Union.
According to the survey 17 reported a majority in favour of leaving, others said there was a split in the ranks and some refused to respond.
Lisa Parker, a councillor from Rugby, said she was “disgusted” by how the party was dealing with the issue.
She said: “We’ve had to consult 27 countries just to talk about reform.
“We’ve sold this country out and we’re being ruled by the European Union – by people who hate us, who loathe us.
“I’ll be voting out, and campaigning every weekend. For the first time in my life I’m questioning if this is the party for me.”
David Sanders, a councillor in Peterborough, said of Mr Cameron: “He didn’t nail the deal. It wasn’t a bad effort but he didn’t do nearly enough to change my mind. I’ll be campaigning to leave.
“Mrs Thatcher would have nailed it. He hasn’t been strong enough with EU colleagues. His best just hasn’t been good enough.”
Local councillors were critical of Mr Cameron in the report by the Guardian, with one saying “all eyes” were on London Mayor Boris Johnson, who announced his intention to campaign to leave the EU.
Councillor David Tee, from Warley, said his constituency party was divided, with some members “waiting to see what senior members of the Conservative Party choose to do – eyes are on figures like Boris Johnson”.
Liz Harsant, chairman of the Ipswich constituency party, said: “They are all for out at the moment. Our MP, health minister Ben Gummer, is in favour of staying but frankly we all want to leave.”
Ken Worthy, chairman of the Claygate and Hinchley Wood branch of Esher and Walton Conservatives in Surrey, said: “The constituency officers are in favour of staying but, from what I have heard, most of the members want to leave, probably about three-quarters, though this can only be a guess.”