I love the level of detail to the map, have you considered using the Star of India from the British Raj for UK Pacific territories?
Glad you liked the custom map. No, the idea of giving the British Pacific territories distinct roundels hadn’t occurred to me. It’s a concept that has potential advantages, for instance because it would highlight Britain’s two-income situation in Global, but on the other hand I like having a single British roundel for the whole world because it highlights the extent of the British Empire. (A grade-school child back in the1930s or so allegedly wrote in an assignment that “The sun never sets on the British Empire because the sun sets in the west and the Empire is in the east.”)