David Cantrell wrote:

That clearly isn't the reason it exists. If it was, they'd not sell
child tickets, nor would they sell tickets to football teams.

It isn't the *only* reason, but it is a significant reason, and the
price point (very high) is typically aimed at that market, with the
cheaper tickets existing as ever to fill spare seats.

Indeed, the First Class seats on the WCML Desiros have what feels like
a tighter pitch than the Standard ones (because the seat backs are
thicker, but hey...) and are still 2+2 - the clear purpose here is that
it's a choice between the Standard scrum (which isn't all that bad on
the WCML commuter runs) and a more relaxed First Class journey, while
the seats are usually substantially better on InterCity type routes.

Neil