The fact that someone has been making a new London square had somehow passed me by completely. A place as big as the middle of Trafalgar Square, comparable perhaps with the restored Georgian courtyard of Somerset House? How could I have missed that? Easy: this great new public space has been concealed in a long-term package of general improvements described prosaically as the "Tower Environs Scheme". And which tower might that be? The Tower of London, as it happens. A tourist haunt. Londoners never go there.