Found a coupon code that appears to give 30% off all official GoPro accessories on their website.
Free express delivery is also included.
Use coupon code HEROSURVEY30 at checkout.
Unfortunately, due to 'shipping regulations' they won't post the dual battery charger and battery, which was the main thing I was after, but the rest of the accessories should be good to go.
Thanks grabbed a few!pity about the battery!