The point about "default" is moot, cause the system defaults to the default only when all other factors affecting the position cease. So you assume the default position only when the positioning matters the least, at situations where the overriding edge-hazard, lane-width and junction-approach rules don't affect your positioning.
Having never been to the British Isles, I could safely say that "default"-positioning rule will have very little effect on my position in London.
The point about "default" is moot, cause the system defaults to the default only when all other factors affecting the position cease. So you assume the default position only when the positioning matters the least, at situations where the overriding edge-hazard, lane-width and junction-approach rules don't affect your positioning.
Having never been to the British Isles, I could safely say that "default"-positioning rule will have very little effect on my position in London.