Officials are also wary that the EU-U.K. relationship may come to resemble the worst aspects of the Swiss one, a complicated mess of agreements which is subject to endless renegotiation and widely disliked in Brussels.

Chemical attraction

The prime minister would not elaborate on which sectors the U.K. should seek agreements with the EU on, stating only that “we’re negotiating with the EU as we go into the next summit.”

British officials say that for now they are focused on negotiating the agreements promised at last May’s meeting.

One senior business representative in Brussels, granted anonymity because their role does not authorize them to speak publicly, said alignment in sectors including chemicals, cosmetics, and medical devices could be advantageous to businesses on both sides of the English Channel.

As well as the agreements on electricity and agriculture, the U.K. and EU last May agreed a security agreement to cooperate more closely on defense, and to link their emissions trading systems to exempt each other from their respective carbon border taxes.

They also agreed to establish a youth mobility scheme, which will see young people get visas to live abroad for a limited period.