In message , at 13:38:20 on
Mon, 29 Jul 2013, Recliner remarked:
I suppose it's coincidental but threads on this group are more quickly derailed than any other.

An interesting observation. Perhaps it's because the subject area
(anything to do with transport in London) is so open ended?

Difficult to keep "on track" [hint hint] you mean?
--
Roland Perry