Win a DVD of the TV series! We're giving away a copy of British Isles: A Natural History on DVD.

If you've been watching the TV series, you'll know it features Alan Titchmarch taking the viewer on a journey through the history of the British Isles, revealing the forests, ice and revolutions that shaped the today's familiar landscape.

Lucky Alan gets to fly in a jet, take off in a helicopter, descend into the deepest caves and mines. The photography in the programme captures the stunning scenery of the British Isles from the outer Scottish islands to the tip of the Scilly Isles.

To find out more about the TV programme, visit BBC Science & Nature.

The prize

Alan by some Millstones

We're giving away one DVD of the complete series of British Isles: A Natural History. Extras on the DVD include a 'making of' documentary, fact files, photo gallery and web links.

How to enter

All you have to do is click the 'play' button below and answer 10 questions about the BBC Oxford Walk Through Time. Once you've answered them all correctly, you will be given a secret code which you need to enter on the form below.

Closing Date: December 6th, 2004