In message , at 22:03:33 on Fri, 7 Dec
2007, Roland Perry writes
the main concourse is at ground level, and the main entry/exit
from the platforms will still be directly from the existing front of the
station, towards the new square, and also via the western side concourse,
which will clearly provide much improved access to the underground. There
will also be a mezzanine level for cafes & shops etc.

Unfortunately there isn't a small size report I can link to, but its all on
the Camden site if you slog through it...

I'm sure that last time I looked the platform ends were going to be
*only* exits [1]. I printed it out when this last came up, but that's
at home 300 miles away. Later this weekend, maybe...

Found it at last. An Arup report for Network Rail "Station Design and
Passenger Movements, dated July 2006, Job Number 118944/03.

I can find no trace of this online at the moment.

I agree that the text does say that departing passengers will go via
both the gateline and the bridge from the [western] Mezzanine, but all
the several passenger-flow diagrams in the report only show departures
for Platforms 1-7 via the bridge.

Part of the problem is that it seems you won't be able to access the
circulating area at the platform ends until *after* going through a
gateline (at which point you are cut off from the Mezzanine facilities).
So it's more likely that people with day-tickets will wait within the
Mezzanine area until their train is given a platform number and they
start to board.
--
Roland Perry