For hour after hour, I’d play on ‘The Triangles’, where tufts of grass became forests in which The A-Team could take cover and broken kerb stones transformed into a ramps that allowed my Knight Rider car to heroically leap any number of death-defying obstacles. I lost teeth, scuffed knees, argued, won (and lost) friends, not to mention Panini trading cards, on ‘The Triangles’ – all (crucially) without the direct supervision of my parents…