Robert Gregorysays There are a number of 33s at Exeter St Davids in this database with a G2 or blank 2 headcode, and as this is on the Portsmouth and south coast platforms at Brighton, I would suggest this is destined for Exeter St Davids. This was a common Saturdays only service later operated by two six-car Hastings Units in the 1970s, and one of the few passenger trains to use the Portsmouth avoiding line at the triangle junction between Farlington and Cosham