SolvedVFR12060 | Appendices: appendix F - List of NATO countries
From HM Revenue & Customs · VAT Visiting Force Relief Manual
The visiting forces that enjoy privilege as member-states of NATO are those from:
Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United States, Greece , Türkiye, Germany, Spain, the Czech Republic, Hungary, Poland, Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia, Albania, Croatia, Montenegro and North Macedonia.
The UK is a member-state of NATO but British Forces have no visiting forces privileges in the UK.