This video provides an overview with step by step instructions for how to start a community garden. This covers finding group members, finding a piece of land, what conditions to look for in a garden and how to budget for it and plan.
It does not require an extensive knowledge of gardening to find and set up a garden.
The video was originally made to cover Toronto, Canada but contains a wealth of information that would be relevant to UK locations.
Source: Live Green TorontoHow to Start a Community Garden,