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A UK Post Code is made up of a number of different parts like these; BS12 6LS or N1 1DF. All together these are known as Post Code Units. Only really large buildings or large mail users have an individual code unit all to themselves. Usually code units are shared between a number of different premises.
It is worth to note at this point that in a built up area an individual Post Code will represent a handful of houses all within a few 100 metres of each other whereas a Post Code unit in a remote or rural area may represent a group of dwellings many miles apart.
WD18 8AJ
WD18 8PX
WD18 8QJ
WD18 8SL
WD18 8SN
WD18 8SS
WD18 8WH
WD18 8WJ
WD18 8WL
WD18 8WN
WD18 8WP
WD18 8WQ
WD18 8WR
WD18 8WS
WD18 8WW
WD18 8YA
WD18 8YE
WD18 8YF
WD18 8YG
WD18 8YH
WD18 8YN
WD18 8YR
WD18 8YX
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