"I don’t see any Eurofanatics around the cabinet table” — British Defense Minister Michael Fallon | EPA In Cameron’s cabinet, ‘we’re all Euroskeptics now’ Defense Minister says migration crisis has changed the terms of the debate.

Every member of David Cameron's cabinet is now a Euroskeptic, according to Defense Minister Michael Fallon, while six ministers are reportedly demanding the U.K. prime minister allow them to campaign for Britain to leave the bloc.

“I think we’re all Euroskeptics now," Fallon told the BBC Sunday. "I don’t see any Eurofanatics around the cabinet table.”

Cameron has committed to holding an in-out referendum on British membership in the EU by the end of 2017, and will present his shopping list of reforms to other European leaders next month.

Fallon was responding Sunday to a report in the Telegraph that six cabinet ministers have privately demanded that Cameron allow them to campaign in favor of Brexit, even if it contradicts the government position.

The ministerial code was rewritten last week to strengthen "collective responsibility," meaning cabinet members must resign if they contradict the government line.

Cameron has left open the possibility of campaigning against British membership in the EU if he is not satisfied with the outcome of negotiations with other EU leaders.

Without going into detail, Fallon said the changes would be designed to help protect Britain against "creeping federalism."

Fallon said Cameron was "pretty prescient to make the movement of peoples and the claiming of benefits one of the key areas for reform." The migration crisis had changed the terms of the debate, he said, as European leaders realized the limits of "the original European construct that anybody can move anywhere."

"We were very wise to opt out of the Schengen arrangements and ... we are right to pursue what is in our best national interest,” Fallon said.

A paper released Monday by the Chatham House argued Britain should pursue closer ties with the EU.

"A foreign policy that prioritizes Britain’s European ‘inner circle’ and does more to find synergies with the EU is likely to be most effective," wrote the think tank's director Robin Niblett. "[A]ll the more so now that the U.S., traditionally Britain’s key ally, is increasingly looking towards the Asia-Pacific, where the U.K. is less relevant, and away from the Middle East and Europe, which are the biggest sources of risk to the U.K.."