Campaigners for the United Kingdom’s withdrawal from the European Union often argue that trade would be unaffected by a historic upheaval. In their reckoning, continued access to the single market is a formality. The UK’s business is too valuable, so it is assumed, to be spurned.

The same people often claim Norway provides a good example of the relationships we could enjoy after “Brexit”. Membership of the European Economic Area combined with a repatriated national sovereignty suits the Norwegians perfectly, it is said, and would suit the UK too. David Cameron disagrees. In this regard at least, the Prime Minister is right.

Before flying off to Iceland for the Northern Future Forum, he made one very simple point: the idea that Norway enjoys a cost-free relationship with the EU is nonsense. The country is spared so-called “membership fees”, but access to the single market costs it in the region of 600 million euros (a little over £430 million) annually. Norway endures no “European red tape”, but suffers something worse: an obligation to abide by EU rules with no say over those rules.

Clearly, advocates of Brexit mean to reassure the public when they tout the “Norwegian option”. But why should reassurance be necessary, exactly, if EU withdrawal means – or so the story goes – that the UK could enjoy all the benefits of membership without any of the burdens? The answer ought to be obvious: in this, as in so many things, there is no such thing as a free ride. Even Switzerland, disdaining the EEA, is bound to the EU by a web of agreements.

According to Espen Barth Eide, Norway’s former Foreign Minister, that country has incorporated roughly three-quarters of EU legislation. Its access to the single market is conditional upon it observing financial regulations, employment rules and product standards. And it pays into the EU budget for the privilege.

As the argument over EU membership heats up, it cannot be said often enough. Europe is as important to the UK as the UK is to Europe. At the heart of the relationship is the irreplaceable right to a say in the decisions affecting this country.