Not sure who exactly levy the tax Rjk
Wales or Westminster
All I know is that the same tax doesn’t apply over the bridge
Michael O’Leary was calling for it to be scrapped
It isn’t
Which is why it’s cheaper to fly from Bristol

If you factor in the cost of getting to Bristol Sludge along with the newly introduced’Clean air zone charge’ @£9 a day as well as the £5 drop off charge at the airport the prices even themselves out mate
I flew from Bristol recently (Tenerife) and have booked to fly from Cardiff in May