In message , at
08:14:53 on Wed, 13 Oct 2004, Jim Brown remarked:
Isn't the Jubilee Line in the way?

This was my original question, is it physically feasible or is the
ground to congested around there with other burrowings?

Are you attempting to shadow the Cannon St line, but Underground? If so,
I think you'd need to cross under the Northern, and be parallel to,
under, the Jubilee. Don't forget that they are planning to build a huge
tower block over LB station, too. The foundations for that are going to
be "interesting", in any event!
--
Roland Perry