In message .uk, at
13:38:00 on Fri, 28 Mar 2008, Colin Rosenstiel
remarked:
This brings to mind the two different ways of getting to
the Circle Line platforms from Kings Cross concourse - the "official"
route, and the one you take if you know what you're doing, through the
deep-level barriers and along the Khyber Pass.

Does that route still exist?

Yes, and I often use it the reverse way. From St Pancras I go down to
the Circle line platforms via the new western ticket hall entrance, then
across to the top of the deep tube line escalators via the Khyber Pass.
This avoids the passageway under Pancras Rd, and the KX ticket hall,
both of which are very congested.
--
Roland Perry