Ok - i have to mention this as it was one of my fave Dr Whos and one that i've remembered for years. I can't remember what it was called but it was set in a tower block and there are old people and young people (The kangs) and all the rest of them have buggered off in a space ship somewhere.

There's these cleaners that are going round killing everybody and all the oldies are canibals. And Bonnie Langford nearly got killed by a big yellow thing in a swimming pool!

Can anybody help me on what this one was called. I think it had the word towers in there somewhere!