Take the train to Brussels and connect with the Chunnel train.
Change at Brussels. Take a Eurostar from London to Brussels. At Brussels change to an Intercity train to Ostend.
Eurostar train from London to Brussels is 2h 01m, London to Bruges 3h 25m
London to Brussels by Eurostar takes about 2 hours
Train timetables are both accessible in local train station and in their online services. In Europe there is a so called European timetables available for European people.
There are a number of online sites that provide train timetables. The web domains "RailEurope," "NationalRail," and "Amtrak," for example, each contain these timetables.
The Channel Tunnel is a rail tunnel and trains run between London and Paris or Brussels. There are some other stations that you could join the train at, but if you are a visitor to the UK, you would be best to join the train in London at St Pancras Station.
catch an east midlands train to London st pancras, then catch a eurostar to brussels zuid (brussels south), then catch a thalys train to Amsterdam
The Eurostar travels between London and Paris, and between London and Brussels. It does not travel between London and Geneva.
It's about 12 miles south of Brussels in Belgium, that's the battlefield, not the London train station !
Saint Pancras International Station. The journey takes about 2 hours.
Most easy way is of course the Eurostar highspeed train. Leaving several times a day from St. Pancras station in the center of London, going under the Chunnel and arriving only 1h55 later totally relaxed in Brussels Midi station, in the center of Brussels.