On 26 Jan, 00:40, wrote:
Maybe operationally, but physically it comes to the surface at
Waterloo facing southeast. *The Northern Line idea probably came out
of the fact that it would be relatively straightforward to branch off
from the Kennington loop.

Having seen some details from the promoters at a transport conference last
year I appreciate that is exactly the reason for preferring the Northern
Line, as well as the ability to fit within line capacity by diverting the
West End service there.

--
Colin Rosenstiel

Diverting implies that its being diverted from somewhere else. But it
isn't. Kennington is the terminus.