Have you been given that as a specific instruction or do you just think that there is no insurance in place?
You better hope that you never need a pilotman or route conductor.
Both pilot and route conductor would be pre arranged to a degree though.
Worst case there is a serious accident, the fire sericxe are only looking for one person in the wreckage, the unauthorised person is thrown clear laying injured but not found as no one is looking for them.
Won’t happen ? I hope not, but it’s a good reason to not do it.
I’d happily pick them up if the signaller asked nicely.
Unless they worked for GBRF ofc…
We as signallers have no right to ask drivers to pick other staff unless it’s been authorised by the TOCs involved, it would be no different to this very situation putting the driving driver in a awkward situation.
Many years ago (15+) I fall for Walter Mitty type who had all the gear including home made ID, I allowed him into the cab after he produced his ID and a story.
I only found out about him as he escalated his behaviour to tried to front end with a driver, the driver got suspicious and called BTP.
Simply not worth your job to allow anyone who isn’t specifically authorised into the cab, or train if it’s in full passenger service.