On Mar 24, 4:52*am, peter wrote:
Just a thought. No idea if it's practical

There's a lot of redundant platforms at Moorgate now. *How about
starting at Moorgate, doing a complete circle then on to
Hammersmith? * Or would that be too much traffic on the Moorgate-
Edgware Road section?

The problems come with the flat junctions at Baker Street and
Moorgate. Trying to fit a more intensive Circle/Lasso service in
between the Metropolitan Line trains that cross it at Baker Street
could be tricky, and ditto for trains 'turning right' to the bays at
Moorgate crossing through trains coming west.

The only way it could reasonably work would be for all Metropolitan
Line trains from the north to terminate at Baker Street, at which
point you'd presumably project these trains on to Aldgate to replace
the Met ones -- but I don't think this would be popular.