Postal code regex for UK Crown Dependencies

[M Goren]

Hi,

I was implementing postcode verification using the data in http://download.geonames.org/export/dump/countryInfo.txt and tests started failing for Isle of Man, Guernsey and Jersey.

Apparently, the regular expression specified for these 3 territories (it is the same regex, repeated 3 times) is incorrect. In fact, it is not possible to match postcodes defined by the UK post office using this regex!

The correct ones are supposed to be:

for Isle of Man, ^(IM(?:[1-9]|86|87|99)\s[0-9][A-Z]{2})$ with format IM# #@@|IM## #@@

for Guernsey, ^(GY(?:[1-9]|10)\s[0-9][A-Z]{2})$ with format GY# #@@|GY10 #@@

for Jersey, ^(JE[1-5]\s[0-9][A-Z]{2})$ with format JE# #@@

Best,

M.