In message , at 21:11:18 on
Thu, 3 Mar 2016, Recliner remarked:

What are these crowds? Green Park is the 14th busiest, with a third of
the entries and exits of the top ones.

When a busy train disgorges lots of passengers, the queues for the
escalator(s) soon back up into the platforms.

They would not have done in 1969.

Also, passengers arriving from the surface have to negotiate the same
route, so the two streams are in conflict.

Sure, but that's the default arrangement at hundreds of stations.
--
Roland Perry