1. lots of telephone samples, rotary dial noises, dial tone, ringing etc. and even some voice announcements - UK speaking clock, cricket scores, "dial-a-disc" music
2. random radio stuff too - announcers between songs, BBC Radio 4 academic discussions, popular maths lessons/shows, even music lessons teaching how to read music. Also there's some news reports with reference to industrial action/strikes of the 80s.
I'm guessing these recording were made early 80s. I'm also guessing too the the BT stuff would probably be copyrighted (music definitely obvs) but not sure about the announcer/voice stuff. Back then I did do a cut-up of various voice bits that I incorporated into a composition (which was never released/published), it was so cut up that there were no identifiable words just rhythmic sounds.
just wondering what to do with them - bin them ?
