It was a turbo.. So no on board staff (driver aside). Not that there would be room for any

It happened a bit before Maidenhead and, once propped back up, he was then leaning on the door that had to open to let everyone off.. So we did make sure that he didn't fall out, also he didn't know where he was until we told him but he decided to get off for some fresh air once we told him as he had a few more stops to go. I had to leave as I'd been called by work and had to go home to work but once off the train he was right near the driver (we were at the front), and also had another passenger looking after him.. So whether the driver or any other station staff were alerted I don't know I'm afraid..
I do now feel guilty I couldn't stay as I would have driven him home to make sure all was ok..But equally I shouldn't feel guilty as
FGW▸ should not treat their passengers in this manner and make them ill like this..