The main SWales-London line goes past St Mellons, so no reason why a small spur can't be laid for a station, other than the powers that be twiddling their fingers and dragging their feet.
Had a leaflet through the door today to take part in a survey.
It was heavily biased towards giving the WAG the power to put in lanes to restrict cars in favour of busses, cycles and walking.
It only had a QR code, so alienated all those people who don't have a smartphone.