Fund managers are increasingly apprehensive about the prospect of a 'Leave' vote in the European Union referendum – though they have a variety of strategies in place to deal with it.

Derrick Dunne, chief executive of Sanlam Four, a boutique manager with £3.3 billion under management, said: "Generally our fund managers are surprised that Leave has jumped into such a strong lead. The overall view is still one that we will Remain, but I'm not quite sure what that's based on any more."