Just outside Hereford in a Large Lay-By, Google Map 52°00'42.2"N 2°44'07.1"W. Most week days till about 3, not sure about week-ends Ill ask when Im next there.
Its rare to recommend a Burger Van but this one is quite different as the Lady who operates it only sells and prepares produce from the Local Farms in the surrounding area, the Burgers and Sausages are just not what you would expect from a Burger Van, delicious. Dont get freaked by the line of Police Motorcycles that are often here, Avon Police use it as a stop on their Training Runs.