They wont have posted them yet, you can always cancel. Ebay also has the Eurohike 250 version for £10 (they're a bit warmer)
Wish I'd I've known this yesterday before I ordered two. Actually it worked out cheaper for me ordering two from Millets. If you're only ordering one then it would be cheaper via Ebay.
£7.99 including delivery on Millets Ebay
Good deal. Ordered, thanks for posting.