Still in Midland livery with MR on the buffer beam. No details of location but in 1920 this was a Kentish Town engine and the location looks like the London extension. According to Bertram Baxter it was reboilered in 1923 and with the loco in such splendid external condition, it has a "not-too-long-out-of-works" look about - so I would estimate as 1923. Any additional information will be gratefully received!