Well, that was an excellent response to what I thought was a challenging problem - so many inventive and amusing clues (the image of the Duke of Cambridge luring travellers astray in the fens will remain with me!).
The clear winner, with 5 votes, is AB, with :
CH4's light entertainment?
Hard luck to hankir, with 3 votes (and, I confess, my favourite).
AB's prize, as probably you have all been expecting (with slightly different punctuation) is:
http://www.youtube.com/watch?v=onqYNO9WQkU
Enjoy!