The 1961 headcodes indicate this is 'Reading and Margate via Redhill' The coaches are a Restriction 1 Maunsell former 4 coach set running as two 2-sets (which would be consistent with the date).
With the Pylons in the distance running parallel to the track we are pretty sure this is Buckland Crossing showing a westbound service to Guildford/Reading. Buckland is an occupation crossing serving a roadway to Kemps Farm and its associated farm cottages, located 1km east of Betchworth station.