I found a document on line from the local authority for the area of the particular camp site. The local authority will issue a licence providing certain conditions are met, included in the conditions are distancing which states that caravans should be 6m apart, if 2 caravans are from the same residence this can be 3m. Under no circumstances should any caravan, awning or car be within 3m from another caravan. It goes on to say that the 6m rule is to provide privacy and the 3m rule is for health and safety and fire regs. I would imagine most local authorities have similar regulations.