A lot of this seems somewhat baffling to me. My job within the entertainment industry sees me dealing with operations on a day to day basis. Whilst i have next to no experience when it comes to procedure on the railway i do feel i have a decent grasp of how things should be able to work and if we look at the safety aspects that will be at play here, i do deal with planning and reports based around areas containing multiple hazards and sometimes upwards of 50,000 people where by the level of alcohol (and no doubt other things) consumed makes them much less compliant than MOST people on the average 9 or 10 car train. So i get that there are some things that have to be done a certain way, i get there are limitations and i get that every single thing needs to be dynamically risk assessed when a situation like this occurs. In short, i understand why it's not possible to just move a train back a bit to deal with an issue.
So this brings me to several points and questions that maybe some people here will be able to answer, it may be something for people to ponder, or it may just summarise things from the thread. If we start at the beginning of the developing situation, the passenger may or may not have reserved a wheelchair space on board this service, we don't know this, they're encouraged but certainly not obliged to do so, but either way at some point between say 3 months before the journey to immediately before departure "the railway" became aware that a passenger was using the wheelchair space in question and wished to alight at Bath Spa. The realistic minimum amount of time the railway is aware of this is around 1hr15 before the train arrives at Bath Spa.
At a point before this incident occurred the 2 5 car trains were coupled together in the way they remained during the incident. There are 4 combinations of formations with these, reading the thread suggests that there IS a "normal" formation and on this day (and perhaps several days before) this train wasn't in the "normal" formation.
GWR (and of course most if not all operators) has a number of stations where certain configurations / formations of their trains don't fit certain platforms or at the very least there are factors that need to be considered when stopping there (Such as the platform 5 at King's cross with a 5 car Azuma in reverse situation). Whilst we shouldn't expect every member of staff to know every station and every train and every configuration it shouldn't be beyond "the railway" to develop a system that DOES know every station and train and configuration. At best this could, on input, flag an issue like this immediately, or if they wanted to save money they could at the very least set a flag on a train that isn't running in "normal" configuration. This sort of thing already exists as PIS at stations will often show trains running in reverse. It's unreliable but that is only because the data isn't inputted properly, this is merely a discipline issue.
So GWR know the configuration of the train, the staff at Paddington know there is a wheelchair user at the very front. It shouldn't be in any way complicated to communicate with everyone involved. This cannot be the first time that a 10 car train NOT in "normal" configuration has called at Bath Spa and it cannot be the first time a wheelchair user has boarded or alighted at Bath Spa, and i would put money on it not being the first time a wheelchair user has needed to alight at Bath Spa on a train that is not in its normal formation. I suspect when this has happened before the passenger has indeed gone to the next stop and returned. We won't have heard about these incidents as they hadn't developed into as big a farce as this one. So whilst we can argue that the passenger could have done the same, we may even form the opinion that they should have done the same, i simply cannot buy the notion that this is the first time this has happened so staff at Bath Spa almost certainly MUST know that a 10 car in that formation is a problem.
A question to anyone who knows, or a question to ponder if not. I would immediately discount setting back, there are definite rules on this and i cannot see how this would ever be a viable option. However, stopping short, allowing the wheelchair user to alight and then drawing forwards to the regular stop point, is there a procedure for this with GWR, or any other operator? Does it come under a general procedure for moving trains, is there something specific? If there is, why wasn't it implemented here? If there isn't, why not? There is absolutely no reason that i can see (and i welcome those in the know to correct me and those not in the know to make suggestions if they're labelled as such) why this couldn't BECOME a thing if it isn't already.
It's one thing the railway continuing to make these mistakes every day, but if we don't implement rules, regulations, procedures to stop these things happening as a result of learning from these mistakes then the railway is really showing its true colours when it comes to how it feels about disabled passengers. Sadly, i think we already know how it feels and yet again we see total reliance on the staff on the ground to do what they can.