wrote:

Why do some london bus routes have a letter in them? Its not like numbers are
in short supply. Do the letters signify something special?

Yes, they refer to the areas in which very local buses operate to avoid the
need to use very long numbers. So W is Walthamstow, U is Uxbridge etc.
RV1 is a special case, meaning RiVerside, though I have no idea if there
was ever planned to be an RV2 or just that it's convention for bus numbers
to actually contain a number of some sort.

Neil
--
Neil Williams in Milton Keynes, UK. Put first name before the at to reply.