Well, I guess decimating the farming, fishing and car industries is one way to remove any negative externalities that might have arisen from the trade they gene

Well, I guess decimating the farming, fishing and car industries is one way to remove any negative externalities that might have arisen from the trade they generated. It doesn't seem like a particularly good way to ensure trade works well for everyone though! I suspect the drug trade will not be massively affected either way by Brexit.