As I set out for the Swanscombe peninsula from Greenhithe station, on the south lender of the Thames in close proximity to Dartford in Kent, on a uninteresting winter day, I explain to myself to be reasonable. I’m heading for Britain’s most recent web site of specific scientific desire (SSSI) but it is not likely to be a wildflower meadow or an ancient woodland. This is a previous industrial website situated on a component of the river extended affiliated with the concealed, the overlooked and the thrown-absent. But some thing magical happens. Pursuing signs for the England Coastline Route, I fall by way of a wormhole in time and find…