Craiged. I understand your question though to give you a definite answer would be difficult, but I will try. Reloading has never been in the forefront of Brit sportsmen for these major reasons. Using muzzle loading guns requiring black powder there are a lot of hoops you have to jump through here to purchase and keep gunpowder. firstly you have to have a gun Licence next you have to have a Licence for the purchase of Gunpowder and another to transport it then you have to have the correct storage container and all of this for a pound of the stuff. Now gunpowder is considered a n Explosive here unlike shot gun cartridge propellant that you can purchase by having a gun Licence, the Brit Government do not like the idea of people having explosives so make it difficult. That is why I gave up shooting black powder guns. Now to purchasing wads primers and smokeless powders shot and wads etc there are very few stockists these days so small turnover high cost, it was not so long ago that we could purchase imported cartridges at very advantages prices that reloading was a no braine, though things have reversed somewhat today.

In the photo is a reloading press from around the 1960s I purchased this from a very large market dealing in second hand goods by Liverpool, I purchased it at the end of the day for a cup of Coffee that was how much interest there was in it. Shooting here be it be clay or game can be far more expensive than Golf unless you have friends who are land owners so Golf Football and other pastimes win out in a lot of cases. Well you dont have to jump through the Licencing hoops like paying your doctor to say that you are mentally stable plus all the police rigmarole forms etc, it is far easier to turn on the Television and watch the Football, or go for a round of golf.
Hope this gives some incite to low level of reloading on this side of the pond.
Damascus