"Gordon" writes:
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? ...

CULG http://www.davros.org/rail/culg/ covers these in the Connections
section for each line, with further description as appropriate in the
Layout or History sections (for example, if the link was at one time
used by trains in service, with the District - East London connection).
--
Mark Brader, Toronto | "I'm not going to post a revision: even USENET
| readers can divide by 100." -- Brian Reid