In message , at 12:42:00 on
Tue, 29 Dec 2015, Recliner remarked:

But surely increased frequencies are not possible until Camden is a
junction no more.

The new signalling helps.

But eliminating the junction would provide a big increase in capacity,
which is why it remains a long-term aim. In the interim, you can
optimise the use of the junctions, by having fewer conflicting
movements.

You could get more through trains at Camden by having the "two branches"
permanently separated, with the current track layout - but the issue
then is a big increase in people changing platforms at Camden, and
that's why it wouldn't cope.
--
Roland Perry