This deal is only useful if you can get to a participating GAME and HMV store.
Game currently are running a trade-in deal which allows you to get Battlefield: Bad Company 2 for £9.99 or £12.99 for the Collectors Edition. Its been confirmed this offer only applies to xbox 360.
One of the 4 games that can be traded in for this offer is Bayonetta. HMV currently have this on special offer for £20, which in itself is a good deal.
Ten minutes work and you can save yourself £10. My first offer so be kind ;P