Could food security in case of another global crisis be a good enough reason? I don't know anything about the British situation AT ALL, but I think many in Europe think slightly different about the market-based solution when it comes to both food, medicines, and other essentials after corona.
It turns out that when shit hits the fan, countries need to handle the basic needs of their population themselves.
People don't need lamb in an emergency.
Exactly... I find all the arguments in the style of "but we need food" extremely disingenuous when it comes to meat production. Almost without exception, more food could be produced by converting land used for animal agriculture into land used to grow food directly for human consumption.