Just popped in to Asda and they have a selection of Christmas DVD's now coming on to stock.
Picked up the old animated Grinch DVD with Horton Hears a Who (the old one, not the Jim Carrey one).
I would assume it was all Asda's but not showing up online.
Play.com = £4.99
Amazon = (out of print oddly, only sold by Marketplace sellers)
HMV = £2.99 (1p cheaper)
The Hut (don't sell it)