Furball, if you like the DVD's you should read the books they're based on...
Simon Schama's "A History of Britain." It's a three volume set, first one convers the early days, Rome, the dark ages, onward, etc... Not sure of its sub-name (lost the book jacket)
2nd one is "The Wars of the British - 1603-1776"
3rd one is "The Fate of Empire 1776-2000"
I know, it's not as interesting as the TV series, but there's a lot of cool information in there... Particularly about the Roman Invasion/Conquest and Churchill.
As per your question though, I'd consider buying it myself... You can't really go wrong for that much bang for 35 quid.