On Sat, 09 Aug 2003 10:18:38 GMT, "Martin Underwood"
wrote:

Are any of the lines in central Liverpool classed as being an underground
system, or are they all just part of the National Rail system which happens
to go below ground?

It's a bit of a grey area, really - AFAIAC, as a self-contained
system, it's an underground (if a small one) - I'd say it was more an
accident of timing that it ended up remaining part of the national
rail system, as IMO if it had been built in the last 10 years it'd
have been a PTE job like Metrolink or the Newcastle Metro.

Neil