These omissions are very common … I think there are several sets of pre-constructed drop downs web-masters can buy.

Some include Jersey, some "Channel Islands" and some just require 'UK' … which then goes Pete-Tong when the postcode isn't recognised. You have my sympathy when trying to do the Internet somewhere off the beaten track.

I've just paid my "Red Light Violation" in Virginia … bit tricky trying to admit to my address when they only offered me US States to choose from. However, "Virginia" seemed to work, even when the rest of it would have been incomprehensible to them