Draw a line along the Greenwich meridian. Map out the landscape around it. Look at the contrasts. Railways to housing to main roads to railways to parkland to river to post-industrial wasteland to the river to Canary Wharf. And in the centre of it all Greenwich Park, the Royal Observatory, the Maritime Museum, the Queen’s House. Look at the contrasts – from that, the historic, the carefully curated, to the peninsula – caught between industry and new development, poised ready for erasure and re-building.