And the order in which I visited them:

  1. England
  2. Scotland
  3. Northern Ireland
  4. Ireland
  5. Wales
  6. Catalonia
  7. Spain
  8. Morocco
  9. Western Sahara
  10. Mauritania
  11. Senegal
  12. Uganda
  13. Rwanda
  14. Kenya
  15. Tanzania
  16. Mozambique
  17. South Africa
  18. Botswana
  19. Zimbabwe
  20. Namibia
  21. Egypt
  22. Israel
  23. Jordan
  24. Malta
  25. Italy
  26. Vatican City
  27. Switzerland
  28. Austria
  29. Slovenia
  30. Croatia
  31. Bosnia & Herzegovina
  32. Czech Republic (and back to Croatia after that)
  33. Albania
  34. Serbia (and back to the UK after that)
  35. France
  36. Monaco
  37. Germany
  38. Poland
  39. Ukraine
  40. Moldova
  41. Romania
  42. Bulgaria
  43. Slovakia
  44. Netherlands
  45. Belgium
  46. Hungary
  47. Greece
  48. Turkey
  49. Georgia
  50. Armenia
  51. Finland
  52. Sweden
  53. Norway
  54. Russia
  55. Kazakhstan
  56. Kyrgyzstan
  57. Uzbekistan
  58. India
  59. Nepal
  60. Thailand