The other thing (and there are many things) is that to move to American food standards would also destroy the majority of animal husbandry in the UK pretty much immediately.
I imagine the rare breeds stuff would continue if they could fit to the UK market demand, but more standard stuff would find itself hopelessly uncompetitive in the UK, and abruptly facing huge tariffs if not outright banned from export.
The other thing (and there are many things) is that to move to American food standards would also destroy the majority of animal husbandry in the UK pretty much immediately.
I imagine the rare breeds stuff would continue if they could fit to the UK market demand, but more standard stuff would find itself hopelessly uncompetitive in the UK, and abruptly facing huge tariffs if not outright banned from export.