Postcodes in the United Kingdom - Wikipedia
https://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom
OverviewSpecial casesHistoryFormattingOperationListings and availabilityOther usesSee alsoThe Channel Islands and the Isle of Man established their own postal administrations separate from the UK in 1969. Despite this, they adopted the UK-format postcodes in 1993–94: Guernsey using GY, the Isle of Man using IM, and Jersey using JE. The independent jurisdiction of Sark was assigned a unique postcode prefix GY10 in 2011 to differentiate it from Alderney. The CEO of Guernsey Post, Boley Smillie, said "this has been a lo…
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