As part of Channel 4's 25th anniversary celebrations, the 4 on demand service is putting up a lot of old content for free viewing. This includes the otherwise-unavailable (unless you or one of your friends managed to video them back in the day) Dennis Potter classics Cold Lazarus and Lipstick on Your Collar (they've also got the prequel to Cold Lazarus, Karaoke, but they've cunningly made it pay-per-view). The viewing window is unfortunately tiny-- but hey, it's free, and I can't recommend them enough.
I first encountered Cold Lazarus when it was shown on CBC in the mid-1990s; being totally ignorant of Potter and the whole context of the story (and also, coming into it mid-episode), my reaction was "cool, the British have finally started producing great sci-fi series again; hope this one runs and runs." Eleven years later and, with occasional brief blips like Doctor Who (which, let's face it, isn't actually new science fiction, it's just reviving an old format-- check out Recyclingwatch if you honestly think it's all that different to the series that ended in 1989), I'm still waiting for the present-day British to start producing great sci-fi series of the sort that seemed to come out weekly in the late seventies (Blake's 7, The Omega Factor, Children of the Stones, Beasts, etc. etc.). Forget WWII and the Blitz Spirit-- this is the sort of thing whose passing the more jingoistic press should be lamenting.