GBPUSD was sold off heavily from 1.3390 to 1.3260 as expected because GBP Long positions were taken profit. Why GBPUSD 1.3260-1.3265, check this article
However, GBPUSD got good support around 1.3260-1.3265 and it went back to the 1.3310-1.3330.
The 1.3310-1.3315 is an important zone to watch for today’s GBPUSD trend. GBPUSD will go up to 1.3390 or further to 1.3500 if the 1.3310-1.3315 holds its support.
However, GBPUSD will make a reversal if there is bad news of Brexit and GBPUSD drops bellow the 1.3310-1.3315.