It’s funny to think that the 80 ducks present on this reservoir before me would have been unthinkable in my childhood. Even stranger is that we now get the birds on our garden pond. Yet all the known sites in the 1970s were in southern England and were often inflected towards landed privilege and material wealth. Windsor Great Park was one of their more prestigious addresses, but the other stronghold for the country’s entire population was at Virginia Water in Surrey (where the average house price today is £1.4m). Even the…