Walter Briscoe wrote:
I recently was on a southbound Northern Line train which was going on
the Charing Cross branch while I wanted to go to Moorgate.
I got off at Camden Town and changed platforms. 20:20 hindsight
suggested I would have been better to wait on my original platform.

Has anybody got a suggestion on the best logic for this?

Try and get in the front carriage Southbound or rear carriage
Northbound. The platforms at Camden Town are based on whether the train
has come from/is going to the High Barnet or Edgware branch.

If you're travelling South, jump off at Camden Town and go through the
cross passage as if you were going up the Emergency Stairs, and check
the display outside the Station Supervisor's office. That'll show you
the next three trains from each Southbound platform, so you can work out
which one to go to for your destination.

HTH,

Barry