Saw this in the Hull Branch of The Works today but looking at other posts on other forums, its a national deal. It was the last one in my local store so not sure about availability. Its an absolutely huge book, 8.8 pounds. Very colourful and detailed book with almost every episode from the first 20 seasons having 3 pages each about facts, characters and jokes from each one.
It is also available from "The Works" through amazon for the same price plus delivery. http://www.amazon.co.uk/dp/0007388152
RRP of 94.99 and is around 55 directly from amazon so for 14.99 its a steal. Believe me Its worth it, you dont get how big and detailed this thing in untill you actually have it in your hand. It even comes in its own hard cover slip case, also with great art work.