Actually - as a concealed weapon the Magistrate will be MUCH less lenient on you. The act of concealing will more than likely up your custodial sentence by quite a bit I am afraid.
LBL
as far as I understand it, concealed suggests that it is hidden but is easy access.
In your bag it is stored ready for use but it is nit quickly accessable. Under your shirt it is deliberately hidden and is in a position where it is easy to get at in a hurry. likewise, a knife in the glove compartment is a concealed weapon, but in the boot with your rucksack it is not concealed mearly stored out of sight