The second is a Brighton bound service at the same location. I scratched my head a bit at this one, but came to the conclusion that it's a 4BEP not a 4CEP. My guidebooks says they worked the Victoria-Brighton until catering was stopped in 1980. Then until 1983 with empty buffets. There will be people on here still drinking weak tea and curly sandwiches as it's 1967 and this unit is still in green with lion crests. As with many SR units the back end of the designation is braking, with all these the EP = electro pneumatic. Then: vestibule,coastway and buffet. I think.
Add': 52 is Victoria-Eastbourne and 12 is a semi fast Vic-Brighton via Redhill. According to my EMU guru with his Ian Allan 1969 spotter book it's a4CEP.