asdf wrote:

It's far better to have consistent (and reasonably well
publicised) route names, and use those. Using "Trains to Stevenage"
for the GN at Moorgate (as mentioned in the OP) struck me as
particularly unhelpful, and exemplifies the problems with this
approach.

And this is not helped by the facts that plenty of trains terminate
short of those stations (e.g. at Luton or Hertford North) and there are
no departure screens or route maps (other than for the Underground) in
the Moorgate concourse.

PaulO