6 to 6 and 1/2 hours
You can't travel directly from Amsterdam to London by ferry because London doesn't have a ferry port. You would have to travel from Amsterdam to Hook of Holland by train (or drive), catch a ferry to Harwich and then take a train (or drive) to London.
It will take about 2 hours to drive from Amsterdam to Groningen, Netherlands.It will take about 5 hours 15 minutes to drive from Amsterdam to Groningen, Germany.
it takes about 6 hours provided you know exactly what time youre taking the ferry and no traffic
About 4h45
Amsterdam has only one main station, "Amsterdam Centraal". All long-distance trains depart from there.
Volcanic ash permitting, about an hour.
3 and a half hours
Drive
It takes about 3.5 hours to drive from Sheffield to London.
It takes about 3.5 hours to drive from Sheffield to London.
It would take about 15 hours to drive.
The flight time is approximately 27 minutes.