Too much jargon for me ... a few simple words of explanation would help. Thanks. I get BPN ok!
The presence of a TRTS button doesn't mean that there has to be platform staff - a guard could equally operate it and leave without permission of station staff (and I can think of plenty of examples where that's the case). A RA would need platform staff, but I haven't signed Blackpool since before the electrification so I'm not sure what's provided there these days.Sorry. I think that Blackpool North has Right Away or Train Ready To Start buttons on the platform that alert both the driver and signaller that it is ready to go. Don't think they can leave without them.