Unfortunately, from 12th October 2010, Eurostar will no longer be allowing its passengers free onward travel to stations in Belgium after arrival in Brussels. Previously, passengers could use their Eurostar ticket to travel to/from other Belgian stations.
This month's (June) Spirit and Destiny magazine features a double page article entitled 'Greener Getaways'. The piece covers various aspects of sustainable holidays and travel, including the carbon impact of air travel, volunteering holidays etc.
Crossrail is a major urban rail scheme currently being delivered in London. The scheme has required the (occasionally controversial) demoliion of a number of buildings within the city to make way for new stations and infrastructure.