There is at least one mistake, in the subsequent images, that I saw. One claims the couple are travelling on Volks Electric Railway.
Oh no they are not! They might be travelling on the Southern Railway, which runs mostly electric trains but..............................
http://www.volkselectricrailway.co.uk/
BTW One of the other images quotes £85 single fare London to Calcutta. I doubt I could get from home to Paris, for that, nowadays.