The given mapcode is using the international context, try using mapcode GBR JJ.66 instead!
🌐
AAA
VHGQZ.SJJX
Territory:
International
🇬🇧 [GBR JJ.66]
England, United Kingdom
🇬🇧 [GBR FT.39P]
England, United Kingdom
🇬🇧 [GBR JDT.Z6X]
England, United Kingdom
🇬🇧 [GBR VS1Q.FCV]
England, United Kingdom
🌐 [AAA VHGQZ.SJJX]
International