In message , Tom
Anderson writes

True. But what you probably didn't notice is all the people who weren't
on the train because they didn't want to go via Waterloo. People from
the north, for example.

Whether people from the north will find it attractive to give-up flying
to Paris or Brussels in order to spend considerably more in terms of
both money and time by travelling via London by train remains to be
seen.
--
Paul Terry