"We've definitely noticed an upturn since the recession," says Rick Garvey, manager of Lee Valley leisure complex, which currently has about "40 long-term residents" living at its Edmonton site (there is a second site in nearby Chingford), paying between £12.30 and £16.40 a night for a one-person pitch (hiring an "electricity pod" costs £3.60 a day and many tents have TV aerials attached plus a mass of wires). It is not just the prices that are very un-London. Looking at the "facilities", the shop and shower block — all housed in faux-Alpine huts with pretty hanging baskets — and ignoring the pylons and occasional waft of sewage (thanks, Deephams Sewage Works), this feels like being in the middle of the country.