The postcode was given to me by someone who lived there.

Thank you. Yes it's indeed a full roundabout. I didn't know how to map roundabout, so just put a miniroundabout. Thanks for correcting it.

Hello. I do remember creating a couple of traffic lights (or pedestrian crossing) on that road. What tag did I use? Was it wrong? Please feel free to fix it. Cheers.

Not sure I understand what you meant. What tag? What shared nodes? And it's so long ago and I was only visiting Cardiff for a day so I know very little of the area. If you are local, I'm sure you can edit the may through survey.

No I don't think it's intended. Please delete it for me. Cheers.