In message , at 11:52:00 on
Sun, 22 May 2011, Paul Scott remarked:

The change they made was moving the Thameslink station. It's as far
south as it could be now, given the curvature of the tunnels. The
whole thing's a mess, frankly. Perhaps the entrance to the new
Thameslink station could have been close by the Eurostar check-in,
rather than halfway to Camden.

Then you'd have 'end fed' 12 car platforms, with all the resultant
congestion - and ensuing failure to spread passengers along the whole
train. There seem to be valid reasons for the position of the main
Thameslink entrance.

But only for passengers arriving via the concourse. There could also
have been a communicating tunnel between the Northern Ticket Hall and
the Thameslink platforms, for tube passengers, to balance it out.
--
Roland Perry