Seems to me that a couple of drivers need to be retained at Cambridge just to shunt trains during disruption.
What like a 'standby' shift?
'Work to control's instructions'.
All the standbys (one at each depot per shift, am's and pm's) were done away with in the fall out from the May 2018 timetable carnage. The union's requests for their reinstatement are met with, "The DfT won't sanction them."
That was also the year in which Control was moved out of King's Cross to Three Bridges.
Of relevance to observations made elsewhere on here, 2L22 (1057 King's Cross to Letchworth), despite being 23 minutes late, took 7 minutes to detrain at Letchworth. I was observing this, and the detrainment was carried out by one member of staff, who was taking almost a minute to check each carriage, with absolutely no sense of urgency at all. The train didn't seem to turn round quickly in the reception roads, and when it did get back to Letchworth (still 7 late) the train sat in the platform for 2 minutes for no obvious reason before departing. There was a crew change at Hitchin which wasn't especially quick, then the run was reasonably okay as far as Alexandra Palace, where a further 3 minutes was then lost being stuck behind a 717 from Hertford.
I remain of the view that there's a lacking in management focus on the basics. 7 minutes to empty out a train in the early afternoon is completely excessive by any measure.
Was it a 387? Class 700s now have a 'terminal mode' which when selected means the staff member clearing the train just presses the door close button at each set of doors and that set of doors locks.
A 387 in contrast, needs the end door key switch operated on each coach, which necessitates heading back out onto the platform every couple of coaches to operate.
They take longer to shut down than 700s or 717s (which had terminal mode from new).
I think the Up platform at Letchworth should be fitted with a sign with the signal number (which is some way off the platform - a good train length at least). Recent resignalling has led to it's renumbering, and I expect a look at a route guide or call to the Signaller is often required to find out the signal number to set up on the GSM-R, as a train starting it's journey here is starting with a new headcode. That could take a minute or two!
Unless you regularly set up there, you won't know it off by heart.
It's frustrating that Up Slow 2 isn't used for late running trains skipping Hornsey and Harringay, using platform 1 at Finsbury Park.