A month or so ago, someone in this thread said they thought it might be a Christmas ploy of sorts, that FFG was waiting until an unannounced release date and that the games were already off the boat. I'm in the U.S. but I checked Amazon's UK site today. Unlike the U.S. site, they have a release date to pre-order by: http://www.amazon.co.uk/gp/product/B013TRY0F6?keywords=Warhammer%20Quest%3A%20The%20Adventure%20Card%20Game&qid=1447387426&ref_=sr_1_1&sr=8-1
So, the previous prediction I mentioned was not far off, it would seem. I can be patient as long as I have a specific date. Thought I'd pass on the info to help alleviate frustration such as mine.
A while back it was listed on the US Amazon site as being available on 11/23. Then the listing was removed for a while. Now it's listed again with a release date of 12/18.