How a 90-second power outage sparked chaos for rail commuters

The power failure which hit a Network Rail operations centre in Manchester was a rare incident. But after commuters were left facing chaos, it has raised questions about how a short outage at one operating centre could have a widespread impact. Network Rail will face scrutiny for how its systems coped and responded to the outage. That's the publicly-owned body whose job it is to operate and maintain Britain's railway infrastructure. That means the tracks, signals, embankments and major stations.