On 2010\08\02 11:30, Theo Markettos wrote:
Neil wrote:
When did I say I wanted to do that? I basically agreed that the
principle of a county in an address was pointless and that we should
use:-

"20 Anystreet
Anytown AB1 2CD"

as our address format. Of course, you only *need* "20 AB1 2CD", but
the inclusion of the street and post town provide a useful "checksum"
to ensure the postcode is correct, and the street address probably
assists the postman on his walk as well.

Depends on how much you need the checksum. If you have an address like:

J. Jones
1 Station Road
Newport
smudge

Should that go to Newport (Isle of Wight), Newport (Gwent), Newport
(Telford& Wrekin), Newport (Hants) or Newport (Essex)? How many
places do you have to send the letter around to find if a Mr Jones lives
there?

Since you're the post office, and you delivered the mail yesterday and
the day before, you should know which Station Road has a Mr Jones in it,
i.e. the person's name is a checksum.