In June last year I looked at Eurostar out of the window my Southeastern high-speed train as it departed for Dover at 11:30am. After arriving in Dover, riding across the city, checking in (and waiting for) the ferry, travelling across the channel, disembarking from the ferry, then riding to Calais Ville station, I finally arrived in Amiens at 9pm. The next day it took another hour (plus a wait) to get to Gare du Nord.
Had I taken the Eurostar I was watching I'd have arrived at my destination for 2pm UK time.