I think that explicit requirement was removed about 10 years ago, when the first moves to allow more operators started.Channel tunnel trains have to be very long to meet the tunnel escape requirements...
Doubledeck trains have a number of accessibility issues to overcome, but the major issue is coping with the numbers of passengers on a full-length train - I don't think the ES terminals could cope!
SNCF are the only major European operator, and they don't have check-in, security etc to deal with. Ouigo double units would be a challenge, which is perhaps why they dont yet use the Paris termini.
Doubledeck trains have a number of accessibility issues to overcome, but the major issue is coping with the numbers of passengers on a full-length train - I don't think the ES terminals could cope!
SNCF are the only major European operator, and they don't have check-in, security etc to deal with. Ouigo double units would be a challenge, which is perhaps why they dont yet use the Paris termini.
I thought they didn't use the Paris termini in order to differentiate the market.
Siemens don't build double deck high speed trains. Alstom has the AGV which is double deck but, at the time of purchase, I don't think Alstom had managed to sell any