On Jul 1, 3:08 pm, Paul Corfield wrote:
It may be but my point is that circular services can run properly if you
get non conflicting junctions and adequate signalling capacity. This is
what Berlin has got on its S Bahn and the service runs fine. The LU
proposals are an attempt to create reliability without the huge
construction costs of removing conflicting junctions of which there are
many on the Circle / District line.

There are six that affect the Circle directly - Praed Street, Baker
Street, Aldgate, Minories, Gloucester Road and HSK. Aldgate East also
affects the Circle, but not as directly.