On 11 May, 23:28, Tom Anderson wrote:
So an Edgware - CX train has managed to delay a Barnet - Bank train.

This is discussed in the Transport 2025 document as the recent they
want to split the line:

"Following the PPP Northern line upgrade, the line will operate 30tph
on the southern Morden to Kennington section, but the branches through
central London will be operating at only 22-25tph and will remain
crowded. The limit on capacity is the need
to inter-work services to different destinations via different
branches."

U