On 2009/04/02 at about 1600, I arrived at Aldgate at platform 4 on an
anti-clockwise Circle line train. I did not hear the driver's message.
There were Metropolitan trains on platforms 2 (which left first) and 3.
I switched to the train on platform 3 (3/4 are 2 sides of an island
platform) when it got green. Although I did not time events, the Journey
Planner suggests a Metropolitan service interval of about 10 minutes.

Since then, I have been thinking about the teacup proposals, whose main
rationale seems to be that there is nowhere to store Circle line trains.
Aldgate seems a good candidate in both directions. Gloucester Road
clockwise and the line between High Street Kensington and Gloucester
Road anti-clockwise seem OK. (Does the latter allow passing Wimbledons?)
Hence my question above.
--
Walter Briscoe