Some gaps remain in Cardiff around the arena construction - diversions will need surveying.
Similarly, I don't know how well signed some of the other alternative sections are, but the relation is now as tidy and well-formed as I can make it.

I've found lots of odd building geometries and weird overlaps that don't seem to line up with any available aerial imagery while trying to make this update.
I've tried not to make anything worse, but needs a bit more attention and some more on the ground survey work.

Thanks for the nudge about the brand tags - I hadn't spotted them when making the initial change. A downside to making changes from a mobile!
I've just edited the node again, so everything should be consistent now.