Here's the planning application:

http://idocs.westminster.gov.uk:8080...r=09/09265/LBC

There's a new concourse above the platforms with three sets of stairs
and a lift. North of the concourse is a new ticket hall and entrance
facing the canal, and running over the roof of the ticket hall is a
new taxi ramp connecting Bishop's Bridge Road to the taxi rank to be
built north of the main station's fourth span.

(there is, strangely enough, an existing abandoned taxi ramp on
roughly the same alignment, although useless since Bishop's Bridge was
replaced a few years ago)

Jump to the diagram on page 31 of the Design Statement for a good 3D
diagram of the whole scheme, and there are some good plans and cross
sections earlier on.

U