Strictly not true. You can buy through tickets - either online, by phone or at the Eurostar Travel Centre in London - as part of your Eurostar itinerary to many destinations in France, Netherlands and even Germany. Free onward rail connections within Belgium is included for tickets to Brussels.

Eurostar services don't just stop in Paris and Brussels either. You can travel direct to Disneyland Paris, or Avignon in the Summer and even the French Alps during the ski season.