I was at the new Southall Station recently. As was also the case with
the London Overground station at West Hampstead, the original station
entrance has been left abandoned and a completely new and much
larger entrance has been created.

I do wonder if the major motive for these larger premises is to create
space for ticket barriers. Reducing opportunities for fare evasion will
be increasingly important until use of public transport reverts to
pre-Covid levels . . . and there are many who predict it never will.