To clarify, the green LED which was flashing was the one furthest away from the power button, which is LED1 according to my Inspire Manual.
As the pack was completely unresponsive, I had no option but to let it drain. I've just attempted to charge it again - connected directly to the charger - no hub, but nothing. I left it on for 20mins but didn't get any lights. looks like it's dead. :-(
I'm wondering whether the charge Hub can cause this to happen?
I'm not about to do any messing around with it. It's have very few charge cycles (probably less than 5 as I tend to use my higher capacity packs first) and 'should' be under warranty I hope.
I've contacted my reseller (OneDrone in Slovenia), yet to hear back, but have no idea how i'm going to go about shipping it to them from the UK - given that the post office always ask whether there's a lipo in any package I send.