Guard also had to lay detonator protection on the Hull line to allow their train to be rescued as the driver was not in a fit state to do so following a SPAD in the fog.
Two interesting incidents on Northern land today:
On the Hull - Doncaster line there was a SPAD (see thread
here) and due to the extremely poor visibility the guard left the train to lay protection to ensure that any other trains that might pass the signal protecting the train would be left in no doubt as to the need to stop and the drive was not able to do so as they were not fit after the SPAD to go walking the track.
LowLevel is rather clearer on what happened - only one train needed to pass the protecting signal (the assisting one, to clear the failure), which would have been specifically authorised to do so, and would have stopped when assistance protection was reached (which, as it happens, is particularly crucial protection in fog, as even a bright red LED handsignal may not be visible immediately at the specified point 300 yards from the failed train).
A GSM-R emergency call would have been quicker, easier and a safer method to protect the train
No, it wouldn't - at the point that protection was needed, it was not an emergency and GSM-R would in all likelihood have just slowed things down and stopped random selections of trains in the area.
The train involved in the incident was in need of "assistance protection", which is a method of ensuring that there is a physical warning to the driver of an assisting train that there is another train in section. It was not "emergency protection" insofar as there had been an accident and other lines needed to be manually blocked by means of alerting the signaller and other trains, by means of track circuit clips, detonators, handsignals and emergency calls. A SPAD on its own does not fall under the definition of an "accident" in the rulebook and would not generally require emergency protection unless there is no other way to prevent a collision or derailment.
This is not to say that assistance protection wasn't needed. It's absolutely critical in those sorts of situations, and as this one shows, it can be very hard to do without a conductor/guard, at times. In thick fog with a train declared a failure, you are working with very heavy machines being asked to get very close to each other with almost zero visibility, and protection against disorientation (which
could have been what had already caused the SPAD,
in theory) is crucial.