Don't think anyone has mentioned the reduced scope of the NLL improvements,
basically the 4 tracking will not go as far as Camden Rd due to the state of
the out of use bridges.
This reduces the Stratford - Camden Rd service frequency in the off peak, as
there is no longer a centre turnback.
Details on the ORR site here, including track diagrams:
http://www.rail-reg.gov.uk/upload/pd...808-annexa.pdf
Paul S