Dave Arquati wrote:
What's wrong with Bayswater for the City? The Circle line has the same
frequency as the H&C, and if Wimblewares were extended eastwards to
compensate for the loss of the H&C, it would see a doubling of frequency.

(The configuration I'm imagining is as now but with no H&C and with
Wimblewares extended from Edgware Road to Whitechapel/Barking... call it
the Wimblebark if you will!)

Building on from the H&C Circle line tea cup ideas - how about two
interposed reverse loops. How about existing H&C trains (to and) from
Barking continuing from Edware Road via Bayswater and Victoria to
rejoin the original route at Aldgate East - whilst Wimbleware continues
to and from Liverpool Street, Aldgate and Victoria to join its original
route at Earls Court.