Ignore my last comment; I was looking at the wrong road.

No it wasn't; now there is no way to access the road.

Is there a source for the tunnel under the Liffey at the docks? I’ve searched online and I can’t find a mention, nor does satellite imagery show an entrance.

May I see a source for this? The OSM wiki states that they are 'power=line' if they’re carried by 'power=tower' nodes.

Congrats. You got Nigel Farage's attention with this one.

I think I’ve fixed all the issues now, or at least most of them.

I made an attempt to fix a few of them just now, and I’ll do more tomorrow. Sorry for that!