Unfortunately, yes. As I understand, I
If you want to use an antique black powder firearm, you need a "ticket" in the UK beforehand unless you are under supervision at a legitimate gun club. You also need a "ticket" if you want to buy a muzzle loader which is less than 100 years old. Buying and storing black powder itself needs a separate piece of official paper.
They certainly have a certain individual romance and charm. You get the item and the history.Welcome.
Muzzleloaders are the oldest and purist branch of firearms.