It's a bit late, we destroyed our farms in favour of multinatioana agribusiness, and told the only laborers who want to do the work to **** off.
The uk can't grow enough food to feed itself, we rely on sunnier climes in the eu for most of what we eat outside of summer. We import 48% of all our food, and more than half of that is from the eu. Most farms are on the brink of bankruptcy already, and the prospect of paying more for labour will kill many this year.
This is why American business and lobbyists are on our backs to agree to buy their rubbish.
I hope you like McDonaldls.