[mnd999]

There's no power rail. It's overhead power - that was the problem. According to the union a manager providing strike cover was responsible for damaging the overhead lines - https://www.standard.co.uk/news/transport/gwr-train-cables-p...

[midasuni]

That seems slanderous by the Union. They are suggesting that (likely a senior instructor) caused the collision and one of their members would have avoided it.