Bob wrote:
http://www.tfl.gov.uk/tfl/downloads/pdf/T2025.pdf

Comments?

First I've seen about segregation of the Northern line.

They reckon they can get 30 tph on both branches by sorting out the
restriction around Camden.

What's needed for this?

I would have thought they'd need to interlace the trains and get 60 tph
through Camden, which they could do by shutting Camden. Or is there a
depot somewhere?

TfL actually claim it just needs Capacity Improvements at Camden. What?
New platforms?

Otherwise, sounds so sensible why hasn't it been done before?