The UK has a strategic nightmare: it has a strong comparative advantage in the world’s most irresponsible industry. So now, in the wake of the biggest financial crisis since the 1930s, the UK must ask itself a painful question: how should the country manage the cuckoo sitting in its nest?

The question is inescapable. London is one of the world’s two most important centres of global finance. Its regulators have, as a result, an influence on the world economy out of proportion to the country’s size. In the years leading up to the crisis, that influence was surely malign: the “light touch” approach led the way in a regulatory race to the bottom.