I have nine countries in my "Countries" section, and even have the right flag for all of them!!

My issue is that 8 of the countries, when I click on them show the dives I've done in that country, an excellent feature! However, the country I've done most of my diving in, Great Britain (UK), shows no dives

I have had to edit al my UK dives in a batch edit, could that be a problem?
Is there any way of amending this please?
Martin