London Mayor Boris Johnson has attacked EU plans to cap banker bonuses.
He said: "People will wonder why we stay in the EU if it persists in such transparently self-defeating policies. Brussels cannot control the global market for banking talent. Brussels cannot set pay for bankers around the world.
"The most this measure can hope to achieve is a boost for Zurich and Singapore and New York at the expense of a struggling EU.
"This is possibly the most deluded measure to come from Europe since Diocletian tried to fix the price of groceries across the Roman Empire."