On Jul 5, 5:08 pm, wrote:
If standing on the left side of the platform, looking down the tunnel
(Towards oncoming train) You can see a rail junction coming in from
the left (Train comes on the right (Drivers view))
is this just a siding or some other disused line? I did not think
there was a siding in KK and have never seen a train use that piece of
track.

It's the King's Cross loop, which is a connection to the Northern
Line. Diagram at the bottom he
http://www.davros.org/rail/culg/northern.html

U

--
http://londonconnections.blogspot.com