MartynSinclair – The Tunnel is already busy during the daytime. The different trains (Eurostar/Shuttle/freight) operate at different speeds so it’s a challenge for the controllers to fit them all in.
I doubt if DB’s ICEs will accommodate so many passengers. One suspects that they will be shorter in length than those used by Eurostar.
DB’s original plans called for a long train but then it would be split at Brussels Midi with one portion going to Amsterdam and the other heading for Cologne/Frankfurt.
The latest Siemens Eurostar trainsets accommodate 900 passengers (the older Alstom trainsets accommodate 750).