In reply to CantClimbTom:
Food miles isn't clear cut on carbon as land use, agri techniques, processing and logistics all feed in to the final co2 figure. A bigger (easier evidenced) plus is keeping the money local..
In the grand sustainability scheme of things it's compatible to the no plastic thing, an overly simplified single issue to help us feel we're doing something about sustainability..
You can probably make the argument that if you was keen on the sustainability angle then supporting your local organic community agriculture / veg box scheme is the way to go. That should generates positive local economic, soil, biodiversity and carbon impacts
Local as in mass produced, supermarket 'English' produce...less so