Im recommending getting on the cheap risk NOW as FOMC and BREXIT REF can only price GU lower in the coming days/weeks - get it now whilst its cheap!
IMO there are 2 things it could have been 1. Algo/ flash buying 2. Some asia-lead Brexit poll that came back "no leave.
Either way both dont have much grounding.
whatever it was MAY set us up for more GU buying today at some point so make sure you have more SELL LIMITS to take advantage of any further upside that you can get some downside GBP risk cheaply!
SELL LIMITS @ 1.455, 1.460, 1.465, 1.469