Maunsell SECR K class 2-6-4T No 790 in around 1920. lan Goodwin says "Looks like the up fast line at Honor Oak Park"

The horse box train appears to be composed rntirely of Great Eastern Railway vehicles; probably picked up at New Cross (Gate) off the East London Line. A train returning to Newmarket possibly?

Photo: H. Gordon Tidey/ Rail Archive Stephenson