The problem with the UK is that there are "official" counties, and "unofficial" counties.
There are (officially)
86 UK counties, but confusion arises when parochial interests come to the fore. There is no "county" called "West Yorkshire", but I've had irate calls from people in this region ask me why I do not have "their county" as a selectable option on the counties list.
You can add (as I have done) some of the "unofficial" ones to your list - (keep potential customers happy), or you can dogmatically stick to the official list.
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