Picture of a unknown referee at Portsmouth v Luton in April 1972. Norman Paget of Coventry was listed in the programme as referee but the pictured referee is not him:
https://twitter.com/FortheR93378109/status/1151448911510458368/photo/1
Looks a bit like D J Biddle (?Derek or Donald?-can't remember) of Bristol
Yes, I would go along with Don Biddle of Bristol. Timing and geography are both correct for Don. A senior police officer if my recollections are correct.