Use the 1st voucher link to get this for £18.99 possibly cheaper if you have any other vouchers.
Next nearest price I can find is £37. Quidco @ 4%
Contains all the episodes from the second new series plus The Christmas Invasion and a host of bonus features.
The Christmas Invasion (2005 Festive Special episode)
Tooth And Claw
The Girl In The Fireplace
Rise Of The Cybermen
Age of Steel
The Idiot's Lantern
The Impossible Planet
The Satan Pit