Brought to the screen by producer David Maloney, who had previously been responsible for the first three series of Blake's 7 and who with a different hat on had directed several Doctor Who serials during the 60s and 70s including the classics Genesis of the Daleks and The Talons of Weng-Chiang, this version, unlike the previous Howard Keel fronted version - which you can watch here - is a pretty faithful adaptation of the novel.
John Duttine plays Bill Masen who, whilst recovering from eye surgery resulting from a close encounter with a triffid's stinger, fortunately misses out on watching the spectacular meteor shower that blinds the majority of the worlds population. Travelling through a desolated London he rescues Josella Playton (Emma Relph) before joining forces with a group of fellow survivors with plans on how to survive the catastrophe; plans derailed somewhat by the arrival of Jack Coker (Maurice Colbourne).
The end result is a fantastically atmospheric and bleak adaptation with some terrific performances from Duttine, Colbourne and Relph (who after a slightly stiff start improves noticeably through the series as she relaxes into her character). The triffids are well realised if a little tottery and aren't particularly frightening but then they were never the main jeopardy in the story, that was always the other people.
Many of the TV shows beloved of Wyrd Britain - Children of the Stones, The Owl Service or The Changes - screened originally when I was a bit too young to be watching (or remembering) but this one, like Sapphire and Steel and The Quatermass Conclusion was mine. I remember being there to watch it and being utterly mesmerised by it. I loved it on first viewing and still do today.
Buy it here - Day of the Triffids [DVD]  - or watch it below.