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Originally Posted by Chris
I live in the middle of nowhere and even here there are not unique postcodes for domestic premises. Every building for a mile either side of us shares the same postcode. AFAIK unique postcodes generally are given to individual business premises that receive a lot of mail.
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A few years ago i followed my satnav to a postcode address in the remote regions of cumbria only to be told on arrival that it was the wrong house and i wanted the one nearly a mile away with the same postcode
anywhoo i found this from the
Royal Mail for the tin foil hat brigade
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The first one or two letters is the postcode area and it identifies the main Royal Mail sorting office which will process the mail. In this case EC would go to the Mount Pleasant sorting office in London.
The second part is usually just one or two numbers but for some parts of London it can be a number and a letter. This is the postcode district and tells the sorting office which delivery office the mail should go to.
This third part is the sector and is usually just one number. This tells the delivery office which local area or neighbourhood the mail should go to.
The final part of the postcode is the unit code which is always two letters. This identifies a group of up to 80 addresses and tells the delivery office which postal route (or walk) will deliver the item.
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