Another thing to bear in mind is our.. interesting.. laws on shooting wildfowl, if the shoots have a duck drive or flight as part of the day you will likely need to look getting some kind of bismuth or tungsten matrix cartridge as its illegal to shoot wildfowl with lead in the UK.
I've shot wildfowl in Scotland with lead. It's been my understanding that it depends on where you're shooting, as in maybe over water or something like that vs over land. But I also seem to recall someone saying that the nontoxic shot requirement is different in England than in Scotland.
