According to The Telegraph, the power plant was down for four days before staff were finally able to fix the problems.
The newspaper reports that water infrastructure in twelve states in the US was simultaneously attacked, but it is unclear whether there is any direct connection.
Intelligence services in several Western countries have often warned that hackers from Russia, Iran and other hostile states could disrupt essential public services.
This time the attack had no clear effect on the British energy system. It is unclear which power plant and what type of facility it was, but the UK has many small power plants that are only used occasionally.
