In message , at 21:27:29 on Tue, 16 Oct
2018, Graeme Wall remarked:

The London Connections map has been displayed at relevant[1]
stations for ages (more than a decade at least).

It's been around at least since the 80s I'm sure.

Quite possibly.

I was being conservative as a defence against the quibble-trolls.
--
Roland Perry