The given mapcode is using the international context, try using mapcode GBR JJ.57 instead!
🌐
AAA
VHGQZ.SJHY
Territory:
International
🇬🇧 [GBR JJ.57]
England, United Kingdom
🇬🇧 [GBR FT.38M]
England, United Kingdom
🇬🇧 [GBR JDT.Z5N]
England, United Kingdom
🇬🇧 [GBR VS1Q.FBR]
England, United Kingdom
🌐 [AAA VHGQZ.SJHY]
International