As an aside, after simply being pointed in the direction of Central Train station by local Officers, the 'innocent' guy (visibly frustrated and upset with his mate) went walkabouts and couldn't be found, despite a search and several calls from the other guy and it got to the point where those of us there were a little concerned
Thankfully, contact was eventually made and (some how) he'd managed to find a van driver friend of his father who was in Cardiff and heading back to the Wolverhampton
For the other guy, still stranded, we managed to find a hotel space in a busy Cardiff city centre and he had to catch a train the following morning (and explain to his boss why he didn't turn up for work!
Hopefully, all was good I the end