Scotland isn't a location option in my bio... why?

Hi, I'm an actor/director based near Glasgow in Scotland but when completing my profile I can only choose Bristol, Liverpool or London as my location.  I know how helpful it is to casting directors to know where an actor is based so I'm just wondering why the locations possible to select are so severely limited to just 3 cities in England?  Would it be best to choose the city my permanent base is closest to, or the one in which I have a temporary base that I can access occasionally for work?  Or perhaps I am simply failing at operating technology, all suggestions/advice welcome. Cheers!