I spent the afternoon at Photo London. The thing I liked best were the photographs of Luigi Gherri, which I’m sure I should have known, but have never consciously seen, so beautifully dead pan, wide angle, slightly surreal, as if life has been drained out of them, views of Versailles from the 1970s. I tried to photograph them, but failed.

Then, I always like exploring the subterranean vaults of Somerset House which show William Chambers backstage, rough hewn, the eighteenth-century city underground:-