My daughter's set her heart on having one of these. Tried recent posts but was too late then found this game at GamePlay for £72.99. Incluides software, guitar, drum set and microphone. It's the value edition so generic instruments. Seems to be around £40 more for the Beatles replica instruments but this will suit my daughter fine.
Currently offering free courier delivery - next day I think if ordered by 13:00
Next cheapest I could find was HMV £79.99.