An impulse from 1.32746 setting the pair's price range in the downtrend. GBPUSD on a 4hr time-frame, the price having a brighter chance to continue with the current trend. This action could be an extra advantage for the price range fall.
Fundamentally, the UK PM may press release on last Friday keeping the numbers in falling mode this could be the good opportunity for short sellers.
If it an impulse means, the market easily fetches the number 1.29746. Or else, in case the price range got any reversal from the current trend, end the trade @ 1.31500