On Apr 3, 11:39*am, Roland Perry wrote:

In message
, at
03:08:44 on Fri, 3 Apr 2009, Mizter T remarked:

I had assumed they would be cut-and-cover rather than
bored. Does anyone know any details?

Sorry, not really. I think they're cut and cover at the northern end
though - see this bird's eye view:
http://maps.live.com/default.aspx?cp...&style=b&lvl=1

The SPILL box itself was built as cut and cover, but that view above
clearly shows why you couldn't realistically cut and cover all the way
to the ECML.

This picture might also be helpful, as it shows where SPILL is
positioned, and hints at the length of tunnel required to meet up with
the ECML (aligned left to right at the very bottom of the map).

http://www.arup.com/_assets/_download/download268.pdf


Interesting. The positioning is pretty tight - avoiding the original
bits of St Pancras station, the British Library and the housing to the
west of Midland Road. I'd be interested to know how far if at all this
alignment deviates from what was there beforehand, i.e. the
subterranean course of the Thameslink line before SPILL was
constructed.