Any idea why this was cancelled by amazon UK?

We regret to inform you that we have been unable to source the following item:

"The End of the World: Alien Invasion"
http://www.amazon.co.uk/dp/1633442373

Our supplier has informed us that this item is no longer available. This item has now been cancelled from your order #204-0343480-7205106 and we can confirm that you have not been charged for it.

Is it not going to make it to the UK pre christmas?

I don't bother pre-ordering FFG stuff from Amazon anymore as at the slightest hint of a delay they cancel the order on the basis that the "item is no longer available". Despite this they will usually then have it on sale within weeks.