Originally Posted by stut

Eurostar is one of the least likely trains to have your bags stolen on. Firstly, the overhead racks are huge. Secondly, there are few intermediate stops, and those that there are are heavily controlled (you cannot enter the platform area without a ticket, passport and security).

However, there are baggage services on the Eurostar, although you are not guaranteed they will travel on the same train:

http://www.eurostar.com/sites/defaul...gage_flyer.pdf

SNCF don't have a checked luggage service, but they do have a door-to-door delivery service:

http://bagages.voyages-sncf.com/