This is a great deal and i suspect it won't last for long, as most retailers sell this for £70 but i suspect this new lower price is only served as a clearance due to the nearby release of the 120gb harddrive, which will be release within a week or 2.
This offer is great for anyone that has bought a Core Xbox 360 or if they just want some extra space but don't want to spend £30 quid on a 512mb memory card.
It's now available for just £44.99 and Woolworths are temporarily offering free delivery on cd's, dvd's and games, which seems to include console accessories as well and don't forget to go through Quidco to receive 5% cashback, making this a great deal at just £42.49 all inclusive.
Hope that helps. :)