Any impressively long wall is bound to cause us to recall the midfield dynamo and philosopher John Trewick. In 1978 Big Ron Atkinson took his bubble-permed West Bromwich Albion team to China on some sort of goodwill tour. The lads’ diplomacy evidently rested in their feet, for when Trewick was asked by the BBC crew documenting the tour what he thought of the Great Wall, he replied: ‘When you’ve seen one wall you’ve seen them all.’