There's 3rd rail here and that the train behind is a 4CEP or 4BEP, so possibly Ramsgate or Margate? The platform edges and call box fit for Ramsgate. Brush Type 2s were occasional visitors to Margate and Ramsgate in summers 1961-65, usually working excursions from North East London via the East London line. For this they needed to be tripcock fitted and the few known examples are all in the D5586-99 and D5622-27 number ranges.