In addition to Al on thread 9, we had a funny episide here relating to an old farmer who for many years after they were banned and totally unbeknown to him (yes, honestly....) he was using a .30 M1carbine to kill sheep on his land. No real problem and easily cured with a one-off and one-on change. Except that he wanted a little .38 S&W underlever. Nope....., he couldn't said the 2i/c of the firearms manager. Whatever next....., the .38 was BIGGER than the .30" he was disposing of. It took some convincing but she finally saw the point - and we saw the funny side of it.
There was a little aside to this story of the farmer and the M1 carbine. He had got the rifle from the US Army billetted on hundreds of acres of his land just prior to D Day (some of the old brick latrine and shower blocks/kitchens still exist). What they had given him was actually an M2 carbine. And from that day in 1954 when it was put on his new type licence, no one had noticed