Re: Non-binding it may be, but we're still doomed.
doubled because we fundamentally don't have enough land to grow our own,
Urban myth. We don't currently grow all we eat, in part because we like eating out-of-season food like asparagus at Christmas, and in part because the Common Agricultural Policy distorts production in EU countries. We're perfectly capable of growing the food we need, even if remoaners nonsensical FUD about being unable to buy from elsewhere were true.
Too many gullible people really seem to believe that Europe only exists because of the EU, but like Americans who think "the world" = "the USA" you need to open your eyes and stop believing the propaganda.