Well done, 716Jones. You are right about both stars as well. I have rarely seen them since Big Deal (Sharon Duce) and Hazell (Roddy McMillan) were on TV. It's great that those shows are on DVD but I would much rather watch this first.
TVTimes coverage, 18-24 September 1971
Sharing the limelight here is forgotten sitcom
Keep It in the Family, with Tim Barrett:

Co-star Vivienne Martin was in a couple of
Armchair Theatre productions herself
21-year-old Sharon Duce and then husband Denis Munro were interviewed for the magazine's 'TV Talk' feature:
Around this time,
future husband - and psychotherapist - Dominic Guard could be seen in cinemas as
The Go-Between.
We're still waiting for the second volume in Network's Armchair Theatre 'series'. The Girl on the M1 was so close to being on the first, sandwiched between Detective Waiting and Will Amelia Quint ... when they were originally broadcast. Two others from the 1971 series made it to Volume 1, Office Party and Brown Skin Gal .... If there is a follow-up, I expect more Early '70s plays will be selected, hopefully including the subject of this thread.