Last Wednesday, Daniel Hannan MEP and the distinguished economist Ruth Lea launched a cross-party initiative for a referendum on our membership of the European Union.

“If,” asks Hannan, “we are allowed a vote on how to elect our MPs, why not a vote on whether those MPs run the country? If we can have a referendum on whether to have a mayor in Hartlepool, what about one on whether the majority of our laws should be handed down from Brussels?”

Suppose that one day the campaign for a referendum is successful: one day it might be, who knows? After all, it was part of the Lib Dem manifesto, and now they are in government. The question I want to ask is this: is there any obvious side on which Catholics should naturally come down?