A building 240m long by 213m wide by 45m high is a megastructure by any standard. If that structure is a football stadium, it’s also an exercise in fluid dynamics: what other building type expects you to house, service and rapidly move a population of – in this case – nearly 53,000? Everton FC’s new home, then, is at the point where a single object becomes a civic realm. Once you’ve strolled round the outside of it, you’ve walked a kilometre.