First look: The new trains for the Swansea to London route

ITV News can exclusively reveal the final designs of a new generation of InterCity trains soon to take to the tracks across South Wales.

Work is underway on the first of hundreds of new bullet-style carriages in Japan for Great Western trains at a cost of almost six billion pounds.

With extra seats and space they should help ease the overcrowding crisis suffered by many passengers.

They will run on the mainline from London Paddington to Cardiff and through to Swansea.

Full size mock-ups of several carriages were secretly built to get the views of watchdogs and the rail industry - and the final design is about to be approved by the Government.

ITV Meridian's Mike Pearse was given exclusive access to see the train of the future.

ITV News has revealed the final designs of a new generation of InterCity trains, which are due to take to the tracks between Swansea and London in 2017.

Mark Hopwood, First Great Western's Managing Director says the new fleet will be five times more reliable than the current one.

The trains are currently being built in Japan.

ITV News can exclusively reveal the final designs of a new generation of InterCity trains, soon to take to the tracks between Swansea and London.

Work is underway on the first of hundreds of new 'bullet-style' carriages in Japan for First Great Western and East Coast trains at a cost of almost £6 billion.

Full size mock-ups of several carriages were secretly built to get the views of watchdogs and the rail industry, and the final design is about to be approved by the Government.