Richard J. wrote:

But that's not the way it works now. Platform 2 is dedicated to the
Circle reversers and platform 3 to the Wimbleware reversers, and there
are permanent signs on the platforms that say so.

Which is fine, as long as only one of each arrives at any time (as
timetabled). If there are delays and two Wimblewares or two Circles are
close behind each other then the timetabled platforming goes out of the
window.