I tlooks as though there is concern that the platforms at Ninian Park in Cardiff can't cope with the numbers of fans expected to descend upon the station for Cardiff City home games. It's much closer to the new stadium than the alternative Grangetown, and as far as I know there were no problems there last season
http://www.bbc.co.uk/news/uk-wales-south-east-wales-14472647
http://www.bbc.co.uk/news/uk-wales-south-east-wales-14472647