The Prime Minister travelled to Taff’s Well to throw his weight behind Transport for Wales’ £14 billion proposals to “transform” the nation’s railways. But what would this actually mean for passengers and communities in Wales? James and Fliss unpack the announcement with our Political Correspondent Cemlyn Davies, following his interview with the Prime Minister and First Minister. They’re also joined by transport expert Professor Mark Barry, who breaks down the practical implications of the proposals — and what the politics behind them might reveal.