Abandoned shopping trolleys are everywhere once you start looking out for them, littering the streets like grimy analogues of the sun-bleached skeletons of imaginary deserts. What do they signify, these forsaken machines of the retail hunter-gatherers?
The herring gulls came to the towns and cities because it was easier to find food there. The seas were emptying but the land was ever more bountiful. Domestic waste and fast food detritus were turning urban streets into medieval re-enactment zones.
I am a much-moved man. Last month I moved home for the twenty-first time. It has become, if not a habit, then a recurring behaviour.