I doubt Mick will be recompensed in any way. I doubt the police will explain anything.
I wonder about the process of getting his guns back. Probably starts with getting a new permit from scratch. Then the process of getting evidence returned...highly regulated evidence. Ugh. More of Mick's life wasted in a bureaucratic cesspool. He has my sincere sympathies.

Question for Smallbores: Do criminals use antique guns in the UK? Muzzleloading pistols?