BR(E) A1 4-6-2 No 60162 not yet named Saint Johnstoun on a down express entering Kinross Junction in c1950. It was named during a HG at Doncaster commencing 19th July 1951 and this vegitation looks later than July to me which makes 1950 the most likely year.

Photo: W.J. Verden Anderson / Rail Archive Stephenson