In article .com,
SimonD writes
I had a look at these scans before making my original post. Looking
at the plan I'd say the mystery tunnel is slightly west of the York
curve, and runs perpendicular to it. It is also much lower than I
imagine the York curve to be.

I finally got round to looking at this tunnel this morning. It appears
to be running under (and perpendicular to) York Way itself. I haven't
figured out where the light is coming from (i.e. where the hole is
that's letting in the light).

I wonder if it's along the line of the north-to-west curve that was
never used, but I thought that was a brick tunnel.

Most mysterious.

I'm not familiar with the proposed layout of the northern ticket hall,
but I understand that there are to be deep level connections to the
tube platforms, which is why I wondered if it was anything to do with
those works.

I believe they are running from rather further east.

--
Clive D.W. Feather | Home:
Tel: +44 20 8495 6138 (work) | Web: http://www.davros.org
Fax: +44 870 051 9937 | Work:
Please reply to the Reply-To address, which is: