I had a lot of trouble finding Wii Play, even back in November, and have just helped out some people in my office who also a) had trouble getting a Wii console and then b) getting Wii Play for anything less than 10-20gbp above retail. The reality is there is wholesale profiteering going on out there - some of these outfits should be ashamed of themselves.
Short answer - i found that online was a waste of time. But i did find THERE ARE COPIES OF WII PLAY AVAILABLE AT HMV STORES IF YOU WALKIN AND ASK EM. This will obviously vary from region/store to store - but i found copies at the Wimbledon, Wansdworth, Victoria and Picadilly HMV stores at 34.95. As of right now(TODAY) there are about 12-15 boxes for sale at the Picadilly HMV as ive just comeback from there. so if you are in London phone em or get to the store and get a copy for yourself. Hope this helps make your christmas day gameplay more festive! good luck
ps. www.WIIPREORDER.CO.UK is by far the best stock checker in the UK. The others have a lot more latency which makes a huge difference if you are looking for a console. Amazon, Argos and Wilkinsons ALWAYS have the best pricing on these.