Sterling fell in European trade away from six-week highs against dollar on profit-taking, before talks are resumed between UK and EU on Brexit.
GBP/USD fell 0.25% to 1.3116, after closing up 1.6% yesterday, the largest gain since March 27.
The largest profit in seven months came as the dollar plunges while UK-EU trade talks take a more positive turn.
The dollar index rose 0.2% on Thursday, the first profit in five days away from seven-week lows at 92.47.
The Guardian reported a resumption of UK-EU trade talks on Thursday and through the weekend to reach a final deal in the last few weeks of the transition period.
Both sides hope for compromise before transition ends on December 31.