Paradise regained: how the world’s wastelands are regenerating

Ignoring the padlocked gate, my six-year-old son Nicholas and I climbed through a break in the metal fence and pushed into the mesh of undergrowth. This was the site of Ducker, the open-air swimming pool that once belonged to Harrow School. Here the young Winston Churchill romped (naked, since trunks were for prefects), as, in his day, did my dad.