On 23 March I answered an urgent question in the Chamber about the power failure at Cardiff Central Station signal box on 22 March that affected all train services into Cardiff.
Ar 23 Mawrth atebais gwestiwn brys yn y Siambr am y methiant pŵer ym mlwch signalau Gorsaf Ganolog Caerdydd ar 22 Mawrth, a effeithiodd ar yr holl drenau i Gaerdydd.