Just getting some chatter from the desks
The cable move was said to be from a big round of selling right as the yanks opened up shop. I've got no news about who or what type of account but that's been the driver, more than the USD buying earlier. The big sell in cable set everything else off, rather then the other way around.
The bounce so far is non-existent so it may not be over yet but whether it's the same mob or others chasing is unknown.
What we do know is that it's continuing to get a battering.

GBPUSD 15m chart
Look for 1.2680 as the first line of resistance now.