The Vatican wants Britain to stay in the European Union, the pope's foreign secretary has declared.

Archbishop Paul Gallagher, Secretary for Relations with States within the Holy See, suggested "Brexit" could weaken Europe.

In an interview with ITV, the English cleric who has a weekly meeting with Pope Francis, gave a clear signal of Rome's view of the best outcome of the forthcoming in/out referendum on continued EU membership.

"The Holy See respects the ultimate decision of the British people - that's for the British electorate to decide," he said.

"But I think we would see it as being something that is not going to make a stronger Europe."

It was a case of "better in than out", he added.

It came amid reports that banking giant Goldman Sachs has donated a "substantial six-figure sum" to Britain Stronger In Europe, the pro-EU group chaired by the former Marks & Spencer boss Lord Rose.

A spokesman for the campaign declined to be drawn on individual donations but said it was "pleased to be raising money from a wide range of sources - both large and small companies and individuals and businesses from all walks of life".

Arron Banks, the millionaire Ukip backer behind the Leave.EU group, said it would have told the bank to "stuff it".

"This comes as no surprise to those of us who have said all along the referendum will be a campaign of the British people against the establishment of international bankers, multinational corporate tax dodgers and out-of-touch politicians.

"We need Britain to regain control of its laws, its borders and its taxes and bankers that can switch their money from Luxembourg to the Caymans without shame are no friends of the British people.

"It will be the thousands of small platoons of ordinary folk that donate their fivers and their tenners that will fund the people's campaign to leave the EU and that's why we will win. If Goldman Sachs had offered Leave.EU six figures we would have told them where to stuff it."