Could these be the trains of the future?

The new trains will use the same technology of the Japanese Bullet Trains Credit: * / AP

The UK Government, is expected to announce a billion pound order for new trains which are to run between Paddington and Swansea.

The new trains will be partly built by Japanese company, Hitachi, the same company who are behind the high-speed Bullet Trains.

Although the new trains won't look like the distinctive Japanese Bullet Trains, they will run using the same technology, which the company says will make them more reliable.

The new trains are part of an 'Intercity Express Project', and they will replace some of the older trains on the Great Western main lines, including the line between London, Cardiff and Swansea.

It has also been confirmed that a new maintenance depot will be built in Swansea to service the fleet.