I know it's been some while since your post, but i had been looking all around the internet to find some old series of bbuk. the only thing that i could recommend you is to download it via torrent because you just won't find it anywhere else, neither as oneclickhoster nor on youtube or something. you should get a torrent software at utorrent.com, then get an account on this page: uknova.com . you can only search for bb files on this page after you got a login. but it will work. you just need to be aware that downloads via torrent might take a week or something. it's like that old peer to peer thing again

hope I could help.
BTW I think you can load any series of big brother uk via uknova, you just need to be patient.