The gun laws in the UK are what they are and not what we want them to be, the reason for flagging this up in the first place was inform UK FAC holders of a potential pitfall in possibly owning something that might, if discovered, cause them problems with their local firearms department, It has been know for someone to loose there FAC for have ammunition that they were not entitled to, one guy even lost his ticket because his 86 year old mother knew where the keys to his gun cupboard was!!!!!
The police can be very picky if they choose to be so why take the risk, yes Sir this spare bolt is for your .410 shotgun but you haven't got one so I will just take away everything else.
Bend the rules no matter how silly they seem to be if you want but is it worth the risk of losing you collection and FAC because of it???????