On 2011\11\20 10:53, Paul Terry wrote:

I know the Kennington loop only connects with the west end side of the
northern line because back in the 60s and 70s I worked on it, will it
stay in service?

Almost certainly, as the proposed terminus of the extension at Battersea
is only two-track, which would not be sufficient for turning back the
full peak-time service of the CX branch.

Why not? Surely more trains are turned in the two-track terminus at Brixton.