GatwickDepress
Established Member
Even earlier than that, from the start of the summer timetable in 1958 a 2-HAL unit would detach from Bognor Regis bound trains (4Cor/Bufs at that time) at the newly-renamed Gatwick Airport station and await the next up train from Bognor.The predecessor of the Gatwick Express was a special sub-fleet of EMUs (4-VEG I think) which were split and joined at Gatwick to trains to/from further south. Subsidiary aspects would have been needed on the Up lines approaching Gatwick to allow this joining move to take place.
I can't remember whether the current signalling was introduced before this practice finished. Even if it wasn't, someone may have decided during the design process that it was worth retaining the sub aspects in case a similar working was needed again.
This practice throughout the 4VEG era(which were 12 4VEPs converted to 4VEGs through adding more luggage racks), and this lasted up until the introduction of the first dedicated Gatwick Express services in 1984, run by 73+488+489 sets. The 4VEGs were converted back to 4VEPs upon the introduction of this service.
I guess any signalling work would've retained the signal "just in case", which seems to be the words to live by for a lot of engineers.
