Hi Lostandfound!
Shortly after 1970, around 75,76 Alan BOYLE, a special pioneer from Liverpool Dingle was doing temp art work at Mill Hill and so impressed F Franz with some stuff he did for him he was invited to Brooklyn.
interesting, thanks
I believe he's narrating this....
Oh, and keep watching to the end as during the credits you can see the people, including Allan Boyle.
https://www.youtube.com/watch?v=YKRcxz2U7aA