In message , at 16:01:12 on
Mon, 26 Feb 2018, Recliner remarked:

I almost missed it at East Croydon: it was increasingly
running late, and there was a last minute, unannounced platform
change, from 4 to 2. Luckily, I spotted the changed departures board,
and just made it up and down the ramps in time. The long scheduled
wait at London Bridge meant we caught up and joined the GN line on
time.

http://www.realtimetrains.co.uk/trai...02/26/advanced

Not the most encouraging diagram in the world.
--
Roland Perry