Best way between London and Amsterdam is the ferry! It's not quite as seamless as a direct train but still very enjoyable: You take a train in the evening fro

Best way between London and Amsterdam is the ferry! It's not quite as seamless as a direct train but still very enjoyable: You take a train in the evening from London to the ferry terminal in Harwich, then overnight ferry in a private cabin (it's a big ferry with restaurant and bar etc.) to a port in southern Holland. Then a train from there to Amsterdam. The train tickets are part of the ferry price (rail and sail) and you get into Amsterdam nice and early.