Dave Arquati wrote:

I'm not sure... calling one "Trafalgar Square" when the other isn't
(i.e. as it was pre-Jubilee) might result in a Covent Garden scenario
where tourists want to go to Trafalgar Square and so make an unnecessary
change to the Bakerloo line from the Northern.

Indeed. This is where a diagrammatic map breaks down, along with the idea
that an interchange is universal (all ways to all ways).

It might be better to show these sort of station groups in a non-diagrammatic
way, to make it clear that:

a) You don't have to travel to the named LUL station to get to a particular
same-named place or NR station.

b) You *can* interchange, but it involves significant walking.

Richard [in PE12]