Forget Brexit, say many leading figures in the City. What matters much more for London as a financial centre is whether the City can make the most of the revolution in financial technology. Can it move quickly to grasp the opportunities offered by innovations such as distributed ledger technology and use them to bolster its competitive position?

There is no lack of upbeat talk from the industry, regulators and politicians. And there is plenty of real investment too. But there are also reasons to be cautious about the speed with which the revolution will take place. And about whether the City can get out in front.