On Thu, 13 Nov 2003 17:32:37 GMT, Helen Deborah Vecht
wrote:

Ian Jelf typed


In article , Helen Deborah Vecht
writes
I *think* it has something to do with where these buses run.
U* buses mostly run around the Uxbridge area
H* buses mostly cover Harrow (except H1, H2 & H3, which go round
Hampstead Garden Suburb)
E* buses have an Ealing connection
PR* run around Park Royal

I think there was once a "PB1 (?) in Potters Bar, too?

Yebbut Potters Bar isn't in London. It's even on the other side of the
M25. (Just)

I believe these prefixess were introduced when Country Buses was still
part of London Transport. Some more letters were S for St Albans
(still in use) and SB for Stevenage. W is in use for Watford and B
fro Borehamwood but I don't know how far these go back.
--
Peter Lawrence