33030 with a passenger train at an unknown location on the SR, third rail visible as is a distinctive modern footbridge. Headcode 55 only exists as a Reading to Tonbridge via Redhill. The location is confirmed as Wokingham, the garage has gone but the white building on the left still exists. ( Thanks to all those who nailed the location and Goggle Street view!). The train is heading towards Guildford.
Slide undated.
Photographer unknown.