The number of people using Cardiff Central railway station has increased by 4.8% in the past year. The figures from the Office of Rail Regulation show that 11.26 million people passed through Wales' busiest station. London Paddington saw a 10.6% increase in passengers over the same period.
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Whilst it should be drier than Wednesday, some rain is still expected.
It will stay largely cloudy tonight and there will be some further rain around, with central parts perhaps staying driest.
ITV Wales understands the reason for the inquiry call stems from concerns raised at the end of 2016 over a former healthcare support worker.