Track used in 1970s radio drama

[Microgramma72]

https://www.youtube.com/watch?v=9k62_dPyjNI
Can anyone identify the music used at the start of this radio play? Composer is Mat Camison.
I've also heard it used in the UK TV series "Public Eye" as background music.

[Lord Thames]

'The Red File', from the de Wolfe LP 'Pop Arp'