I would think the worst case scenario would be a license like up here and thousands of people have been issued licenses . nothing has really changed other than some with depression being knocked back for a license and most have fought it and won.
you can get a collectors license ,vermin control or airgun club or a combination of the 3 . and plinking in your garden is not banned but some conditions do apply .
Storage for then is the same as it is no for you down south and the way it has been since 2011 . Under lock and key and no cabinet specified like FAC and SGC.
So if they follow the scottish license cheme you may be worrying unnecessarily .