It goes like this;
…..The malignant busy-body across the road hears that you are making a flintlock in your shed so she takes pleasure in dropping in to the local police station to ask if it really is legal for you to do this. The plod think it all sounds ok, except,..they have not heard of anyone else making a flintlock in their shed and they need to cover their backs, so they tell their firearms officer to take a look……
The firearms man visits you and your shed and thinks it all looks and sounds ok,..except, he has not heard of anyone else making a flintlock and there is a chance that you are making it to shoot the malignant busy-body. So, he makes notes and snaps pix on his phone of any parts you have made and, needing to cover his back, hands it all to someone higher up.
The higher up plod think it all looks harmless, except, they have not heard of anyone else making a flintlock in the shed and, needing to cover their backs, they ring up the Home Office to check……
The HO immediately looks in it's file for any similar event which has been 'tested in law'. if they don't find anything applicable they pass the matter on to the Assoc.of Chief Police Officers, who refer the matter to their Firearms and Explosives Sub Com…..Who will send more experienced and intelligent plod back to look more closely at your shed and everything in it!……….Now is the time to lose that old copy of Mein Kampf that you use for a door stop!
….If you think that this could not possibly be the train of events then I refer you to just one case,..that of Alan Westlake and his 'Westlake Engineering'…….take a look at his website on google and go to 'history' to see his exchange of missives with the HO.