Sustain have put together a Food Co-op Toolkit which has all the information you’ll need on how to set up a food co-op in your area.
Food co-ops are a great way to save money on your weekly shop, while making sure that everything you buy comes from trusted local sources. They are usually run by volunteers and there are a number of ways that a food co-op can be set up, from starting a buying club in association with a local community centre, starting a project from scratch or setting up a community shop. Go to the toolkit to learn more and see what you can do.
Source: SustainHow to start a food co-op,