There is an extraordinary sign on the outside of a well-tended West Yorkshire vegetable garden: "Help yourself."
In the same town this summer, people will be helping themselves to sweetcorn growing around the police station. Compost and watering cans seized in drug farm raids find use in the local gardens. And come the autumn a trip to see a local doctor will be a pick-your-own free-for-all as the health centre's grounds have been turned into orchards.