The Bank of England's biggest problem? The City of London

Governor Mark Carney should use his Mansion House speech to tell the Square Mile it must stay on a short leash

When the Bank of England's governor, Mark Carney, addresses City grandees this Thursday at Mansion House in London, he could step outside his usual comfort zone and make his thoughts on Donald Trump's trade wars and their dampening effect on global growth more explicit.

Closer to home, he could document the impact of Brexit and the danger from a Conservative party that insists on pressing ahead with it, even if that means leaving without an agreement.

Since 2016, the Square Mile has grown more self-satisfied by the day as reports of banks fleeing prove to be exaggerated