As BIgman1234 says, route needs tobe set throughout, for a passenger, there are no overlaps on the signals, there is a possibility that the points are not locked by FPL's
Instructions will be in the Special Box Instructions, and if the move is not booked (Charters) then authorisation is normally needed tomake the move, the Driver also has to be advised.
I work Colchester, when a train has to traverse the Goods, the authority is given by the SSM, the driver will be stopped at CO1011 and advised he is running via the Goods Road, maximum 8 car, the route must be set and locked from CO1011 via P1 and down to the nxt signal in the Down Mainor Down Clacton. If we have to run a 12 car, it will not stop at Colchester and run to the Town or Hythe, likewise an IC servuce will be first stop Manningtree, with Passengers returning on next service. On a connected item, over the Christmas period this year, all through trains from 27th December to 2nd Jan ( I think those are the dates) are booked via the GL and P1 with a max of 8 cars, other trains in from Ipswich / Clacton will terminate on P4 and P5