I am trying to book tickets on the Eurostar from London and then on to Amsterdam. It's in two parts, of course, with changing trains in Brussels for a separate part of the ticket on. I am wondering how long I need to allow for this change, given the varying ticket options - do I need an hour or two to change trains (travelling with children) or do we only need 5 or 10 minutes?
Also, is it true that it is preferable to book these tickets (on eurorail) before we leave home? Do the tickets take very long to arrive?