Agreed Jim, unfortunately, here in the UK, you really need to dot the I's and cross the T's with these things ... Make sure all the legal requirements are rigidly applied.
The gutter press (all of them from what I can see) would have a field day otherwise.
"Machine gun parts dug up by gun nuts shock"
Or a rabid variation of the above, perhaps including the word assault, the usual dreadful pathetically poor journalism the UK excells at these days...