Is there a website which includes details of "odd" stretches of the LU
network not normally used for passenger carrying journeys? I'm
thinking mainly about connecting links between different "lines". Are
any of these quite lengthy? Would most drivers working Line "X" and
Line "Y" be trained to work over a connecting line between the two? Is
the link from the District Line to the East London Line just a short
tunnel section with double-track?

--
gordon