This afternoon I caught the 15.54 London Midland service out of Euston. Despite the lights and no doubt heating being on inside the train, passengers were left standing on the platform until two minutes before departure.
I assume this is normal London Midland customer service.
The train that form this service comes empty stock from Camden, therefore DOO. So will not have its doors released until the Guard gets there after their inward working or PNB.
There was also a further change at some point, whereby the passenger doors are only released by the guard, never the driver. This was most noticeable on the 0715 from Bletchley, which is brought in from the sidings about 10 minutes before departure; the driver who brings it in used to release the doors, whereas now they wait for the guard to do so, who arrives much later. I wonder if this is the more noticeable factor - do guards generally get to the train later than drivers, perhaps as they have less to do before departure?
I suspect both of these were always the rule and have more recently become enforced.
Neil
Although us Drivers aren't strictly allowed to release doors, some of us still do.
With me it now depends on the time of day and location;
I recently bought a unit out the sidings early morning, released doors when on the platform. Signal clears, departure time comes and............ no Guard. Signalman calls me up saying he's been informed the Guard has failed to book on and there are no spares available so I'm to run empty stock in my booked path.
Hmm, "sorry signaller, I can't depart straight away as I've let the passengers board so will have to empty the train out again. Do you want the signal back for the train due through in a couple of minutes?"
Followed by me missing my booked path, waiting for 2 passenger trains and a freight to go through. Then crawling behind them to destination, getting there late for my return working which was also then delayed as a result.
If the 350s are the same as the 450s then door controls are in the cab, beside the desk and on the rear panels. There maybe a rule within the company to say that drivers must not enable the doors.
We have a rule that says that. So unless the guard gives you permission to do so, the doors stay locked and passengers stay in the cold & wet or snow.
The Controls to the right/left of Driver's desk have been disabled. The buttons on the back wall still work with the desk live as long as the Guard isn't keyed in elsewhere on the train.
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Another reason for trains being locked up is a UPC (Unit Previously Coupled) test. When the trains are prepped at the start of service, all cab controls etc are also tested. If units are coupled up then the intermediate cabs cannot be tested as the controls are dead.
For example an 8 car train may get prepped and goes North from Northampton to New Street. The units are then split into 2x4 car. The South unit (which now has a fully prepped South Cab and unprepped North Cab) gets driven from New Street to Euston using the South End Cab. On arrival into Euston the Guards diagram will say to lock the unit up for the North Cab to be UPC tested. So they lock the doors off and disappear for their next working/PNB. Driver then comes along to UPC the cab and we're back to waiting for the Guard to come release the doors prior to departure.
Some units sit at Euston for 1Hr+. Leaving the doors open isn't an option as the platform will have other services arriving/departing on top leading to confusion as mentioned by others.
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To address the coupling with/without passengers on board. I think the major differences are down to modern couplers. Older units have to be literally slammed together for a reliable couple, this could easily lead to passengers been thrown around and claiming for whiplash/injuries.
The more modern trains latch themselves together when you get them close enough, so absolutely no need for a jolt when they join.