I am writing this on the 8.16 to Amsterdam from St Pancras. Made a bus journey to reach St. Pancras at 5.39 for the 6.16, but missed a connecting bus as the first leg of my journey arrived 8 minutes late at the stop where I was to change bus. Arrived at the St Pancras entrance to the ticket barriers at 5.48 - 28 minutes before departure (which turned out to be late anyway). The screen said the gate was closed. With hindsight, I should have tried pretending I was getting another train and tried the ticket at the scanner - as plenty of time and hardly anyone waiting. But I was turned away when I was honest about my destination - of course I might not have been let in by the machine reader itself, although business class was still allowed to board and I assume they are linked to the same system. Tried to persuade them to let me board at business entry but the guy manning that was seriously arsey - zero humanity. "Respect the ticket". Fortunately, although the staff at customer services were not going to over-rule him, they did at least find space for me - after a fair delay - on the 8.18 at no extra cost. I went through the ticket barrier over 2 hours before departure in spite of the train not being on the display board by that stage, to relax and kill time in the departure area. The strangest thing is that, even with this delay, I almost made the 6.16, as it was delayed by about 5 minutes. If the European passport control had been a bit quicker I would have. Anyhow, the moral of this tale is not to rely on buses, even when you catch them at 4.39am with zero traffic, and suffer the cost of a taxi. Because at St Pancras for sure, the staff enforce the 30 minute rule.