The dollar has been on the backfoot for over a month now and the pound has been gaining due to this. And it is not only the dollar weakness that is helping the pair to move higher, it is also the inherent strength in the pound as well as the pound has been helped by the anticipation that the Brexit could be a soft one rather than a hard one after all. This would help the UK to continue with a majority of its trade with the Eurozone which would be beneficial for the UK in the long run.