Wasn't sure where to put this!
On the Eurostar website, it says to arrive at the station (St Pancras) 90 minutes before departure, at least. Do you really have to be there that early? My train into Waterloo doesn't arrive until 07.48 and the Eurostar train leaves at 09.01. Will this be cutting it a bit fine? It's midweek if that is of any relevance.