If anyone's interested there's a brilliant Elstree Studios documentary by Rubén Jiménez Brinquis on YouTube called Elstree Studios: The Andrew Mitchell Years.
It's really just a sit down with the son of one of the former managers (Andrew Mitchell) but it does so with a lot of insight. Covers everything from The Shining to Golan Globus. I've never quite been able to work out what part was demolished but with all the clips I have an answer.
The 1080p file is 1.10GB.