So taking the Royal Honorary appointments to one side, how exactly do you treat a 'celebrity' appointment?
I would hope that as gentlemen, whether officer or NCO, sir and ma'am might be appropriate in the first instance, but that might just be me being a little old fashioned.
If the individual hasn't undergone selection or training, do they have 'honorary commissioning scrolls', what is the authority to wear the rank? If one has to salute celebrity honorary appointments because they hold a 'commission', does that mean they have the rights and privileges associated with a commission? If so, are we likely to be seeing the honorary appointments completing CCS and fitness tests? After all, CCS may not be mandatory above a certain rank (wg CD-R IIRC), but senior officers are still encouraged to lead by example.
All genuine questions rather than a fishing or trolling exped. If celebrities are appointed to these posts because of their access and media abilities, then do they really need to hold rank at all?