Likely the Official Secrets Act played a role, along with the convenient fig leaf of business activity often closely aligned with his own interests, admittedly. I suspect quite a few people would come forward if a serious investigative team started digging through it all.
I've just remembered this as well from the midsts of time.
https://www.upi.com/Archives/1984/04/24/Crown-may-pay-for-cameras-clothes-sprayed-by-prince/1107451630800/
LOS ANGELES -- The British consulate may pay $1,200 to a photographer whose cameras were sprayed with white paint by Prince Andrew.
Consulate spokesman Angus McKay told UPI Monday that payment is still 'under consideration' and is being discussed with royal family representatives in London.
The prince picked up a paint sprayer during his four-day Southern California visit last week and squirted paint onto American and British journalists and photographers covering the royal tour.
He then wiped his hands on a newspaper and told county Supervisor Kenneth Hahn, 'I enjoyed that.'
Chris Gulker, a photographer with the Los Angeles Herald Examiner, said Monday he was most upset not by the spraying but by the prince's response.
'He didn't say, 'Oh my God, I'm sorry,'' Gulker explained. 'He had such a grin of delight.'
The Herald Examiner presented the consulate with a $1,200 bill the same day, saying that would cover costs of replacing equipment owned by the newspaper and the photographer.