Actually if you read your own link - the BBC is just saying that the Telegraph reported this.
And the same BBC article says that the Telegraph reported it as "the power plant was shut down for four days", whereas on the other hand, the UK Government DESNZ said it only "affected a small-scale generator" not even an entire power plant.
It's always difficult in these situations to read through the FUD and see what the truth is.
[1]: https://www.bbc.co.uk/news/articles/ce9793g34yvo