I've just recorded this film but it is not the one I remember. I recall that the 'Triffids' were just like Pitcher plants with a central appendage with which they could sting (or blind?) people. They were rendered harmless when this appendage was cut off. Another thing I recall is that the film I saw ended on the Isle of Wight (or another island maybe). Am I confusing this film with the TV series or was there another 'Triffid' film out there somewhere?