Is there anyone who can remember a telly series sent at least 25 years ago that was about a contagion killing everybody in its path.....not 'On the Beach'......the contagion was possibly radioactive....not sure. It showed the total breakdown in society...very scary. I don’t know which programme it was on.
It might well have been Survivors although I don’t recognise any of the characters. The one I do remember was a very scruffy looking fellow who was always up to no good.
I thought of Survivors too. Could have been 'Threads' which was a docudrama about Russia dropping a nuclear missile on Sheffield (ostensibly to take out RAF Finningley near Doncaster), though central character in that was a pregnant young woman. https://www.imdb.com/title/tt0090163/?ref_=nv_sr_1