Jarvis and Network Rail will be prosecuted over the Potters Bar rail disaster, which killed seven people in 2002 after a train derailed.

The Office of Rail Regulation (ORR) announced that there was enough evidence to proceed with criminal proceedings after an inquest in June and July this year.

Both Jarvis and Network Rail will be charged under the Health and Safety Act for failing to properly install, maintain and inspect of adjustable stretcher bars which keep movable sections of the track the correct width for a train鈥檚 wheels.

The companies could face an unlimited fine if found guilty.