Option#3 patched the Navcore, but have you seen if there is a dct file in the map folder ?
For the UK and IR are he next meta's available, compare these with yours, please.

18 24 0F 0B 1F FE BC C9 5D 41 21 2A 9A EF 96 86 United_Kingdom_and_Republic_of_Ireland-101256.meta ; United_Kingdom_and_Republic_of_Ireland 995_8507
5C 3B B0 BC 3B A0 4D CF 6F 7D 3E A6 93 9C 43 1B United_Kingdom_and_Republic_of_Ireland-101296.meta ; United_Kingdom_and_Republic_of_Ireland 995_8549

Have you read your mail ?