Three clips from Radio 2 in 1972.
In the first one, a 6-minute clip, we get trails for various shows that will be on later, then the news from 18th June 1972, then a couple more show trails.
The second clip (also from 1972) lasts 10 minutes and is from a music show presented by a DJ who's name I don't know. He mentions "I went to see Sonny & Cher last night at their one and only performance in this country" so it could probably be dated from that.
In the last clip (probably from 1972 or thereabouts), a little over 3 minutes, a song ends then the shows host David (David Jacobs?) chats with his guest, harmonica player Jimmy Hughes. Jimmy plays a song for a couple of minutes before the tape ends.