No idea I'm afraid, Andi - I popped in to buy Emerald night and saw the bargains when I was looking around. Picked up Rogue Shadow on the cheap, but already had the other discounted sets (got them half price when Lego [email protected]
were doing a similar deal).
I suggest you give the Brighton store a call - sure they'll be happy to tell you what's on sale. I predict that the discounts will also apply there BUT if they don't you can always tell them about the MK deals and see what they say !!