As I had an early morning meeting at Tate Britain, I thought I would walk down from Westminster tube station through the streets round Smith Square.   I have always liked this unexpected survival of early Georgian London:  the great Roman Baroque church by Thomas Archer surrounded by streets – Barton Street, Cowley Street, Lord North Street – lived in by plotting parliamentarians and grace-and-favour houses owned by Westminster School.

These are details of the church:

And these are the streets: