In message , at 08:11:55 on Tue, 21
Jul 2009, Martin Edwards remarked:
Conversely, I frequently have to tell people in Birmingham, where I now
live, that Watford is not in London, though it is actually in
Hertfordshire and about thirty miles from the Square Mile. Many also
think it is the same place as Watford Gap, which is named after a
village of 400 people in Northants.

The gap's named after the village of Watford. It's a fascination place
with (in order of development) Watling St/A5, Grand Union Canal
(Leicester Section), WCML and M1 all within a quarter of a mile.
--
Roland Perry