Cardiff is an important railway hub in southern Wales with local, regional and long-distance intercity trains passing through the city. Commuter services arrive at the station from the city suburbs and it is also on direct routes from stations in Gloucester, Nottingham, Birmingham and Manchester as well as from London Paddington. The route from London Paddington also provides a direct link between Cardiff and the cities of Swansea and Bristol. There are at least 30 departures a day from London to Cardiff with a journey time of just over two hours.
Cardiff Central is the main station in the city and the stopping points for trains on the London Paddington to Swansea line via Cardiff. The station is an attractive listed building and is the busiest terminus in Wales. Its facilities include car and bicycle parking, ATMs, wifi, cafes, a newsagent and a small convenience store.
Trains from London Paddington to Cardiff are operated by Great Western Railway while other intercity services are provided by CrossCountry. All services from London are direct and take just over two hours to complete the journey.
Travelling by train to Cardiff from London is cost-effective and much faster than travelling by coach, plane or driving. Once on the train, passengers can sit back and relax in comfortable carriages with onboard facilities that include wifi, power outlets, tables, luggage space and toilets as well as buffet and trolley catering. There are two ticket classes and seats can be reserved if required.
Named the capital of Wales as recently as 1955, Cardiff spreads out between an ancient hilltop fort and a revitalised waterfront that has become a leisure and entertainment focus for the city. As well as having plenty to offer visitors it is also a good base for exploring the beaches and countryside of southeast Wales as well as its ancient and industrial monuments. Highlights of a stay in Cardiff should include Cardiff Castle and Llandaff Cathedral. The city centre is compact enough to explore on foot and there is a good transport network of overground local trains, taxis and buses including shuttle buses to Cardiff Airport which is located 12 miles from the city.
Here are some other resources that might have the information you need