This is the test of the Dia 37 1st Coupe. There were two of these, one in the City Ltd train at the Norwood Juction Bridge breakage which initially got me interested in the carriage. Simon sent me an email a few weeks ago of a newly discovered picture of these and one compartment brake 1sts with the rest of the train made up of 1sts. Here we are then and the brake 1st is in the next photos!