Katharine C: new (cheap) TGV service - Ouigo

A picture of one of the Ouigo trains on a trial run

                       

Ouigo is a new (starting April)  French low-cost train service between cities of Marne-la-Vallée (near Paris) and Montpellier and Marseille, via Valence. Ouigo is a subsidiary of the French national rail company SNCF, but it is independently run from its parent company. 

http://www.smartertravel.com/blogs/today-in-travel/new-ouigo-budget-tgv-launches-in-april.html?id=14088298

Ouigo - that's We Go for Anglophones.  

Really cheap fares - 10 euros from Marne-la-Valle (EuroDisney) to Montpellier.
Not as convenient as Gare de Lyon of course!!