Catholic teaching insists politics must serve the common good, while history shows that even the deepest ruptures can be reversed. Hence Lord Michael Heseltine’s recent warning is clear and relevant: Brexit may not last.

In the years since the 2016 referendum, Brexit has often been spoken of in the language of permanence. “Taking back control” was not simply a policy choice but a final break with Europe, an irreversible assertion of sovereignty. To question it is to invite the retort that “the people have spoken” and the matter is settled for good.