On Jan 31, 12:46 pm, 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?

If the fare is capped, a change from Euston to Euston Square might be
sensible. The change between the two branches at Euston is not to be
attempted more than once.
--
Walter Briscoe

If you do need to make a change at Camden get in the front carriage of
a southbound train and the rear carriage of a northbound train and use
the very much shorter, and less used, tunnel at the south end of the
platforms.

Kevin