And those who have firearms for sporting purposes?
Members of more than one club?
Again, that is not law, just guidance.
My S1 firearms are all owned for sporting purposes and my Home Office approved club is following the rules/guidelines that they need to meet that approval. I appreciate that not all clubs are HO approved and therefore usage may not be recorded in the same way but surely that then means the Police should be asking for different evidence of usage.
Stalkers and Estate Firearms (if that's what you mean by Sporting Purposes) - well they are indeed another issue but in the scheme of things, the majority of shooting activity in this country is for target purposes and club membership is mandatory for ownership.
I have membership to 3 different clubs but I have to nominate one of them as my main in order to record usage. If I had nominated the NRA then I would use their PC based system, LERA also record use but they're not my main club either. .
Guideline/rules whatever are different for shotguns of course but I'm not sure that they are what would interest 'terrorists' the most.