Me: "But then, you were only joking, James, weren't you?"
Rail Blue: "Damn, you noticed. Actually, there were one or two serious ideas in there... (mainly Wimbledon - Stanmore and Rayner's La - Edgware Rd)"
"Wimbledon - Stanmore": So you take the present Wimbledon-Tower Hill service of the District Line, extend it past Tower Hill and curve it round the Circle Line (presumably replacing the Circle Line, to get the track capacity needed?) to Baker Street, then up the Met to Finchley Road, and then across on to the local tracks to take over the northern end of the Jubilee Line. But at the same time you are terminating all Jubilee Line trains at West Hampstead, a through station consisting of just one island platform. How many tph do you suppose the Jubilee line and your Wimbledon-Stanmore service could handle at West Hampstead? This is a *serious* suggestion?
"Rayner's Lane to Edgware Road": Presumably Uxbridge would get the Met only, a reduced peak-hour service? This new service (presumably badged as District Line) would go Rayner's Lane-Acton Town-(via the District Line tracks, i.e. local)-Earls Court-High St Ken-Edgware Road. A real nowhere to nowhere service! And assuming it takes the Circle Line capacity between High St Ken and Edgware Road, with the Circle not operating (see above), there is no service between Gloucester Road and High St Ken at all, and only the Hammersmith & City line (6 tph) between Edgware Road and Baker Street.
You cannot be serious!