The Unthanks wrote the music for the first 2 episodes of Wurzel Gummidge on BBC1 last Christmas (2 programmes).
This year, only one programme was made with the soundtrack written by someone else . I was disappointed until they appeared in person on the balcony of the pub overlloking the sea and played a couple of fantastic numbers live at 51m 20 secs into the programme.Almost certainly worth checking out the 3 programmes as well if you haven't seen them.
https://www.bbc.co.uk/iplayer/episode/m000qq50/worzel-gummidge-saucy-nancy
Cheers
Tony