Britain's Post Office on Wednesday a reported a surge in demand for euros and US dollars in its local branches and online this week, ahead of Thursday's referendum on European Union membership.

The Post Office said overall currency sales were up 74 per cent year-on-year since the weekend.

For Tuesday alone, currency sales in its branches were up 49 percent from a year ago, and 381 percent higher online.

A spokeswoman said customers were exchanging pounds for a mixture of euros and dollars. –Reuters