postcodeUK.js

// Matches UK postcode. Does not match to UK Channel Islands that have their own postcodes (non standard UK)
$.validator.addMethod( "postcodeUK", function( value, element ) {
	return this.optional( element ) || /^((([A-PR-UWYZ][0-9])|([A-PR-UWYZ][0-9][0-9])|([A-PR-UWYZ][A-HK-Y][0-9])|([A-PR-UWYZ][A-HK-Y][0-9][0-9])|([A-PR-UWYZ][0-9][A-HJKSTUW])|([A-PR-UWYZ][A-HK-Y][0-9][ABEHMNPRVWXY]))\s?([0-9][ABD-HJLNP-UW-Z]{2})|(GIR)\s?(0AA))$/i.test( value );
}, "Please specify a valid UK postcode" );