Went into Blockbuster on Hull Road in York
They are doing Mario & Sonic at the Olympic Winter Games (Wii) (released Fri 16th)
for £27.99 plus giving away £5 worth of rental vouchers
Cheapest I could find it anywhere!
Also, the guy behind the counter said that all major new release games are covered by their presale guarantee which is they wont be beaten on price by HMV, Game or Gamestation within a 2 mile radius.
Hope this helps!