Hi there

I made the edit primarily because someone deleted the road completely as if it didn't exist when really it was just under long term closure. It looked more like a mistake than a road closure so luckily I did my research before just readding it blindly.

I gave the first link a skim, and to me it says it opens on the 27th of this month, which will be a few weeks. Either way in fairness, it's possible the bus company might be slow to catch on.

I'm not local to Milton Keynes, and by the sounds of it neither are you, but if you're confident it's reopened then feel free to change highway=construction to trunk and delete the construction tag.

Cheers,
Sam