Another UK Postcode oddity is Gibraltar which has GX111AA as the postcode for the entire country
Although it’s disputable whether they are a part of the UK, or separate administrations that have postcodes designed to look like a UK postcode!
Is there a rule on how big a post code is supposed to be?
(Now, my current postcode in the UK is just the single house. That for example feels way too small to me.)
Which means that unlike (5 digit) ZIP codes and German Postal codes, UK Postcodes are typically pretty useful for navigation - people will often enter a postcode into a Sat-Nav to reach a home or business. However, sometimes this can entirely fail - e.g. for a historic house on a large estate which may have access some hundreds of meters away from the postcode indicated location, and so sometimes you'll see a separate postcode to put into your Sat-Nav !
https://www.youtube.com/watch?v=oDI7GejJSjk
City/overseas territory*