Just as a follow-up to this, from personal observations by Mrs H and myself from within a train in each direction this week:
- At Grosmont, as has been said, the ground frame on the NR line is released both by the single-line token and an Annetts Key - we may be mistaken but the latter appears to be kept in a cabinet and remotely released from the box, like a GWR Key Release Instrument.
A train proceeding towards Whitby gets a main-arm signal to leave the station - I'm not sure how this is worked as there did not appear to be any red levers in the ground frame to control it.
- At Whitby, the NYMR's platform is similarly signalled as a shut-in facility in the single line. This means trains have to stop short approaching the station whilst the ground frame operators (there seemed to be two travelling on every train, although some may have been trainees) walked to the GF to do the business.
Likewise trains departing either end have to stop clear of the ground frame while it is closed-up. one of the operators has to walk the length of the train to give the driver his token.
At Whitby platforms there are "start of token section" signs but engines/trains can proceed beyond these up to another sign which prohibits passing beyond without a token. I am slightly mystified by this but I suppose it allows running round. Yet you would need to have a token to ensure you don't conflict with a train in the other platform.
- At Sleights, trains in the direction of Whitby meet a "Stop and Telephone" board (preceded by a distant board) which presumably protects the above shunts onto the single line at Whitby. Drivers do not leave the cab so the telephoning is, I guess, made by mobile phone - to Nunthorpe presumably.
- Not all steam services come straight back from Whitby - one appears to shut in at Whitby and return over an hour later allowing a diesel to arrive and depart.
All in all it seems a frightfully complicated and cumbersome arrangement but I guess it was cheap. It makes the steam services very slow with all the stops, although to our ears the passengers were largely oblivious to the technical reasons and all we heard were comments about running early or waiting for a platform.
There seems little scope for increasing the service for high demand and to my eyes if that became necessary they would need to look at re-doubling and working both as separate single lines. That's just my opinion but some trains were heavily loaded in mid-September so I should think in high summer they are already crowded. I think platform lengths and steep gradients preclude longer trains.
The line is virtually used to capacity because the diesels have to be clear of Glaisdale before steam trains can join the single line. This was noticable on our train which had a scheduled 25 minute wait at Grosmont and it seemed odd to have to wait a fair amount of time after seeing the diesel leave for Middlesbrough.
All trains carry a modern electric headlamp and flashing tail lamps while on NR property, althought these are commonly changed once on NYM metals.
John