Mrs n is off to watch the foos on the 25th where would be easyist place to pick her up as I do know some of the streets will be closed off oh we do have a blue badge
Depending on which side of Cardiff you're coming from/going back out. I wouldn't try anywhere closer than Grangetown/Riverside on one side and Pontcanna/Butetown oh the other. It'll be absolute chaos irrespective I'd have thought.