I was told the reason was the 180s wouldn't talk to each other?!
This is one of the problems with the 180s, they have a tendency of being a bit temperamental where the computers/electronics are concerned and just one coupling refusing to "talk" will screw up the diagramming and end up with, as was the case this time, delays to passengers.
ajax103 said:
I believe it changed in December as the Grand Central HSTs now have SDO fitted to their doors although the crews aren't trained on them.
BDI crews still not trained on slam-door stock and, following a chance conversation with someone concerned with this, the cost of training staff on slam doors could make it prohibitive. Also the drivers would need to learn the traction, which is even more expensive than on-train staff. At present only a couple of the Bradford drivers sign HSTs and this will soon be reduced with one transferring North from what I gathered. Therefore, for the time being cost may be the biggest factor in preventing HSTs operating to Bradford.
In addition the Mk3 version of SDO has certain limitations in the way it can be used by staff (eg. having to return to the same panel for dispatch) and this was, I believe, another reason why there is hesitance on the part of GC to introduce them to the Bradford route.