The station is right next to the stadium....Its the big stadium thing not far away..(it's impressive) but as MIL is blue badge, why not drive and take advantage. Cardiff is fab for getting to...M4 to Cardiff Gate (whichever junction that is) (about 45 mins from Bristol assuming you can get out of Bristol, £5 quid rip off bridge tax to the Frogs) Drive into centre, unload MIL etc, display blue badge, all go and watch the game. Easy.