Chief executive Nicolas Petrovic said the train operator saw demand fall away following the attacks in the French capital which saw 130 people killed.
However, he added trading started to pick up in 2016 while forward bookings for the summer were “positive”.
He added 10.4 million passengers used the service in 2015, the same as in 2014, while the strength of sterling also had an impact on revenues. At constant exchange rates revenues were flat but with actual rates revenues fell by 5% from £867 million in 2014 to £821 million in 2015.
