I thought that article was kinda illuminating - a bit like the walking versus driving calculation above
You think you're doing the climate a favour by growing your own veg, but you're not necessarily. When we built our (pretty big) raised beds we bought wood for them, plus put in a load of drains which meant a mini-digger and a couple of lorryloads of gravel. Also we have a polytunnel and a fruit cage. That's a lot of infrastructure
I kinda feel like you guys would actually remove a lot of food miles over time though, rather than like someone getting a lockdown project polytunnel that is now in a skip. I've a notion ye's are vegetarian to start with which could be wrong?