I just wondered what the views are on passengers boarding first class carriages and walking through to standard. The reason I ask is I just attempted to board a GWR train today which was short formed and in reverse which I only discovered at the point it was arriving so I ended up by the first class door. I attempted to board the composite carriage to walk through to the standard and was prevented from boarding by thr train manager. I've been travelling on trains over 40 years and it's the first time I've ever heard of this. His subsequent arguing with other passengers and the resulting huge queue at the standard door delayed dispatch and given the circumstances seemed really pointless. Seems a bit of pragmatism would have been sensible.