While there is no clarity on who her successor will be, markets are concerned that the next prime minister will want a tougher divorce deal, although the EU has said it will not renegotiate the Withdrawal Treaty it sealed in November.

Those concerns have pulled the rug from under the pound over the last two weeks, prompting traders to sell the currency against the euro and the dollar aggressively and dialling up expectations of Britain crashing out of the EU without a deal.

But on Friday, markets were broadly in a consolidation phase after 14 consecutive days of losses against the euro as traders trimmed back some of their negative bets on the pound before a mid-morning statement by May.

"None of this should come as a surprise to currency markets, and as such should already be priced in, with the pound already looking a little firmer in early trading," said Michael Hewson, chief markets analyst at CMC Markets based in London.

The pound edged up 0.1 percent up against the euro at 88.28 pence. Against the dollar it also rose 0.1 percent higher, to $1.2672.

Still, derivative markets were broadly quiet with risk reversals on the pound holding near recent lows while one-month volatility indicators remained subdued.

Political uncertainty remained front and centre for traders with retail sales data for April ignored as markets looked forward to a statement from May.