diff --git a/resources/vat.json b/resources/vat.json
index eb5cabe..318c4d5 100644
--- a/resources/vat.json
+++ b/resources/vat.json
@@ -3,7 +3,8 @@
     "ATU[A-Z0-9]{8}"
   ],
   "BE": [
-    "BE0[0-9]{9}"
+    "BE0[0-9]{9}",
+    "BE1[0-9]{9}"
   ],
   "BG": [
     "BG[0-9]{9,10}"
@@ -34,11 +35,6 @@
   "FR": [
     "FR[A-Z0-9]{2}[0-9]{9}"
   ],
-  "GB" : [
-    "GB[0-9]{9}",
-    "GB[0-9]{12}",
-    "GB[A-Z0-9]{5}"
-  ],
   "GR": [
     "EL[0-9]{9}"
   ],
@@ -68,7 +64,7 @@
     "MT[0-9]{8}"
   ],
   "NL": [
-    "NL[A-Z0-9]{9}B[A-Z0-9]{2}"
+    "NL[A-Z0-9]{12}"
   ],
   "PL": [
     "PL[0-9]{10}"
@@ -87,5 +83,10 @@
   ],
   "SK": [
     "SK[0-9]{10}"
+  ],
+  "XI": [
+    "XI[0-9]{9}",
+    "XI[0-9]{12}",
+    "XI[A-Z0-9]{5}"
   ]
-}
\ No newline at end of file
+}
diff --git a/tests/Unit/Repository/VatRepositoryTest.php b/tests/Unit/Repository/VatRepositoryTest.php
index b1b7718..3a4abc6 100644
--- a/tests/Unit/Repository/VatRepositoryTest.php
+++ b/tests/Unit/Repository/VatRepositoryTest.php
@@ -94,6 +94,7 @@ public function provideViesSamples() {
     return [
       ['AT', 'ATU99999999'],
       ['BE', 'BE0999999999'],
+      ['BE', 'BE1999999999'],
       ['BG', 'BG999999999'],
       ['BG', 'BG9999999999'],
       ['CY', 'CY99999999L'],
@@ -110,10 +111,6 @@ public function provideViesSamples() {
       ['FI', 'FI99999999'],
       ['FR', 'FRXX999999999'],
       ['FR', 'FR99999999999'],
-      ['GB', 'GB999999999'],
-      ['GB', 'GB999999999999'],
-      ['GB', 'GBGD999'],
-      ['GB', 'GBHA999'],
       ['HR', 'HR99999999999'],
       ['HU', 'HU99999999'],
       ['IE', 'IE9S99999L'],
@@ -124,15 +121,19 @@ public function provideViesSamples() {
       ['LU', 'LU99999999'],
       ['LV', 'LV99999999999'],
       ['MT', 'MT99999999'],
-      ['NL', 'NL999999999B99'],
+      ['NL', 'NLSSSSSSSSSSSS'],
       ['PL', 'PL9999999999'],
       ['PT', 'PT999999999'],
       ['RO', 'RO999999999'],
       ['SE', 'SE999999999999'],
       ['SI', 'SI99999999'],
       ['SK', 'SK9999999999'],
+      ['XI', 'XI999999999'],
+      ['XI', 'XI999999999999'],
+      ['XI', 'XIGD999'],
+      ['XI', 'XIHA999'],
     ];
   }
 
 
-}
\ No newline at end of file
+}