I just got this information from the Switzerland Travel Centre
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| Paris Gare de Lyon will be the new hub for all TGV Lyria services to/from Switzerland. From the 11th December 2011 onwards all train services to/from Switzerland will arrive and depart at Paris Gare de Lyon. This means that you need to plan longer transfer time between stations when arriving by a Eurostar service into Paris Gare du Nord. We recommend that you allow at least 1.5h for a transfer between the stations (For the transfer use direct RER connections, the métro network or take a taxi in front of the station). | |
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This is a backward step for the railway's efforts to compete with airlines.