Used Euston on Saturday morning, everything was late arriving because of some issue earlier, and so some very short turnarounds. An LNR arrived on the platform next to my service and they announced before it even pulled in. They then announced my service about 10 seconds later on the next door platform. This meant you had 2 trainloads of passengers going onto the platform, and a trainload trying to get out.
To make matters worse you had Avanti RPIs making no attempt to tell people which lanes they could use up top, but shouting at people for using the wrong ones once in them, including LNR passengers using the lane for their platform, that all the boards had told them is leaving in 1 minute.
They then proceeded to let 2 Avanti’s, including mine, out in front of it anyways, and it departed 10 minutes after the boards had said.