We got giftcard for DW on 28th May. CM asked if we had pre-registered(we hadn't), he said somehow travellers from UK are managing to pre-register but he had no idea how.
I just had to write down our address for him to enter into computer, only takes 2-3 mins to do. We did it on way into MK, just before they opened gates to monorail no line(about 8:30am).