Cheapest I can find, unsure about quidco.
Using the 10% off from walkers rainday you can get this down from £16.85 to £15.17.
From the creators of Shrek, Madagascar and Kung Fu Panda come How To Train Your Dragon, an animated adventure comedy set in a mythical world of burly vikings and wild dragons, based on the book by Cressida Cowell.The story centres around a viking teenager, who lives on the island of Berk, where fighting dragons is a way of life. Initiation is coming, and this is his one chance to prove his worthiness to his tribe and father. But when he encounters, and ultimately befriends, an injured dragon, his world is turned upside down.
* Double Play Blu-ray & DVD pack
* Animator’s corner featuring Picture-in-Picture Storyboards
* Behind-the-scenes footage and interviews
* Dragon fun facts and Viking games
* Deleted Scenes