(13 Oct 2020, 8:57 pm)Adrian wrote I'd specifically asked the question in respect to the last run of any given service on any given day, as I wasn't actually sure what was supposed to happen. At the time, If I recall correctly, there was a number of instances of the social media going out but no comms as to what to do.

Id not heard that before and certainly haven't seen anything published or communicated to passengers along those lines. 
Seeing a message like that, I'd certainly look for alternatives - rather than hang on for a replacement bus.
Quite what a vulnerable person would do in that position, is anyones guess.
Their needs could be one of many, such as cash, family, lack of alternative transport, medical, psychological etc and to not know a replacement is coming must be horrendous. Particularly on a cold, dark, wet night.