I have just been sent further information and a link (Alan Bowness and Artists’ Lives – Sound and vision blog) to Bowness’s involvement in Artists’ Lives, the best possible resource for recent history and not as well known as it should be. I also listened to Norman Reid on himself and Nick Serota on him too (https://www.bl.uk/voices-of-art/articles/nicholas-serota-norman-reid-as-director-of-the-tate-gallery). Highly recommended.