The top photo features camera operators Philip Thickett and Alan Duxbury. The lower photo features camera operator, Keith Froggatt.
If the photographs are from The Various Ends of Mrs F’s Friends, then they date from 1981.
The following comment was added on the Pebble Mill Facebook Page:
James French: ‘That is a Nike crane from London. It only came up a couple of times. I’m guessing this is from ‘The Various Ends of Mrs F’s Friends’ directed and choreographed by Gillian Lynne?’