In article , Roland
Perry wrote:
I had a Honda with Satnav and it undoubtedly used the same mapping
as Microsoft MapPoint - it had the same silly mistakes in the
data!

They may (or may not) have been deliberate. It's standard practice with
maps to introduce small errors so that they can be later be used to
prove copyright violations. But if it wanted to send you up the M25 the
wrong way perhaps not!

--
Tony Bryer