Lord Howe of Aberavon, who served as chancellor and foreign secretary in Margaret Thatcher's government, said the Prime Minister had made his position more difficult by his "repeated concessions" to the Eurosceptics.Unfortunately for Lord Howe and the Pro-EU campaign, the people whom they have to convince are a growing majority of sorts who hate the EU and pretty much all it stands for and simply want a free trade zone, not a political union.
He said that Mr Cameron now must give a lead on the issue, and not leave it to outside individuals and organisations.
Mr Cameron is currently committed to renegotiating the terms of Britain's membership and then putting the outcome to a vote in an in/out referendum after the next general election if the Conservatives win power.
But while the Prime Minister has said he wants Britain to remain in the EU, Lord Howe - whose resignation over Europe in 1990 triggered Baroness Thatcher's downfall as prime minister - said that it was not enough.
In a statement released by the pro-EU British Influence campaign, Lord Howe said: "The more people understand and experience the reality of Britain's place in today's interdependent world - an interdependence which Conservative policies in the 1980s did so much to promote - the less likely they are to want this country to leave the European Union.
Unfortunately for us the person leading the Tory party has also admitted that he wants to keep us in and I expect he'll rig the vote to keep us in if he can win a few minor concessions from the EU to justify a Neville Chamberlain moment moment for the UK public.
Interdependence does not mean the UK has to remain in the EU, if anything the EU hinders trade and development because it's a trade cartel and doesn't allow cheaper food and good from abroad into itself for sale. Were we independent of the EU we could perhaps rejoin EFTA and trade happily with the world (and the EU) without being tied to the ridiculous regulations that they put in place to hamper trade and innovation.
I still believe we'll only be offered a referendum if they know the vote will be a pro-EU one, Cameron has given me no other reason to believe so.