Thanks. The flights from LCY often end up out in the sticks at the E gate so I'm well used to that and the ride on the Heidi train, but a potential queue at immigration is more of a problem! I'm normally on an early flight, but BA have cancelled that one so I'm now landing at 14:20 and the last train I can catch from the airport to make my preferred connection at HB is at 15:15. There are later trains from HB of course but it makes for a rather long travel day.
Fingers crossed then...