I googled "Nuts in May" and Wikipedia states it was first broadcast as part of the Play for Today series in 1975.
I just watched the first few minutes in the low res video link below and it brought back lots of memories. However, I think it deserves to be watched with higher quality video and sound so I stopped watching it after Keith had paid for his camp pitch.
https://www.dailymotion.com/video/x55y5q
It really is quite special and I'm hoping it will be released on BBC iPlayer again. A search shows that it has been on iPlayer before (sadly no longer active) so it may pop up again alongside Abigails' Party.