In message , at 11:17:21 on Wed, 28
Sep 2016, Neil Williams remarked:

Those places are designed to sell theatre/attractions tickets, and
are virtually nothing to do with tube ticketing.

No they are not. They are intended to sell TfL tickets as well. The
sale of other tickets is to make them more financially viable.

https://tfl.gov.uk/fares-and-payment...buy-tickets/vi
sitor-centres?cid=visitor-centres

They may wish to spin it as somewhere to buy tube tickets, but in
practice the huge queues mode at glacial speed, and there's virtually
nothing to see from outside which makes it look like other than a place
designed to sell theatre/attractions tickets.
--
Roland Perry