I'll stock up on lead shot loaded cartridges & keep shooting pigeons, corvids, rabbits, pheasant & everything else just as always. None of what I shoot is sold, as I eat it (apart from the corvids, well, apart from a couple...).
IMO this is being driven by the big estates, as it's only them who supply a significant amount into the retail food market & TBH I'm not one for using live quarry as a substitute for clays, which modern driven game days seems like to this country bumpkin.