Hi Nigel,
I wasn't able to find a copy of the documentary but it can be found at some libraries, universities, etc. There was a post on David Icke's forum of all places that lists some sites where it can be viewed, I also happened to find a book with the same title on eBay. Apparently it followed the airing of the TV program. Good luck with your hunt, You might want to check eBay sometimes - most things end up there eventually.
https://forum.davidicke.com/showthread.php?t=306357