That was pretty much my thought too. I doubt SouthEastern could have done anything differently up to the point at which the first passenger got off the train. But with hindsight (and I know things are always easy with hindsight) perhaps it would have been more sensible, once that passenger was off, the power was cut and multiple trains were therefore now stuck with no power or heating, for someone to realize that in this situation trains would become very dark and very cold, and it was inevitable that more passengers would start de-training (I hate that word) before too long,. Therefore the least bad thing to do would now be to just get everyone off all the stranded trains as soon as possible, so that they wouldn't then be continually delaying the eventual restoration of power.
A couple of other possible questions and lessons for the future that strike me:
- Trains that you can't walk through the whole train potentially make evacuation very hard. Perhaps future guidelines should be that new EMUs and DMUs that are intended to be connected together should always be built with a through passageway through to the end of the unit (On this note: how would you evacuate a class 465 if it was stuck in a tunnel?)
- There are already many reasons why having guards on all trains would be very desirable (personally I'd feel much more comfortable travelling on SouthEastern if a guard was regularly walking through the train to check tickets etc., not least in order to deter antisocial behaviour). But the events of Friday give another reason why an extra trained member of staff on the train would be very useful.
- Over how wide an area did power have to be cut when the first person detrained? Was it only cut in the area that person was plausibly likely to be in, or did the limitations of the equipment force power to be cut over a much wider area? If so, is that a possible area for improvements to the power supply equipment?
- As other people have pointed out, not having station staff trained to go on the track and to assist in evacuating trains seems a pretty big oversight. I know there's some cost to doing so, but surely, compared to the total cost of running the railway, it would be tiny? Presumably you'd be talking about having staff away on training for a week or two per year. Something like a 2%-4% increase in the number of station staff needed so you cover that, plus the cost of a couple of instructors. Seems worthwhile to me.