In message , at 11:59:34 on Wed,
19 Apr 2006, TKD remarked:
The longest Tube journey is on the Central Line, West Ruislip to
Epping, at 54.9 km (34.1 miles).

Although 11km or so are not in London but in the Epping Forest district of
Essex.

When this newsgroup was set up we discussed at great length what the
definition of "London" was. I'm pretty sure we decided that it included
inside the M25 plus all outposts of LUL.

--
Roland Perry