Having traveled with Eurostar May 2022, and about to book a new travel with them, I wonder if the advised 'be at the station 60 to 90 minutes before the train leaves' is a cut off time.
I will have to travel by public transport to both start points, across London on my way back home. I do not mind to plan to be there 90 minutes before the train leaves but with public transport you always have to consider the risk of a train not going or being delayed, in which case you may arrive at the station with less than 60 minutes, but with some time before the train actually leaves.
When waiting for the train to leave last May I saw people arriving and checking in till shortly before the train left but I could not see whether they were a special class with a shorter deadline.
So my question is, what is the actual shortest time to check in, assume the cheapest ticket class, and if it makes a difference, Amsterdam and London St Pancrass.