105 is a new three-digit number that people can call to report or get information about power cuts.
You can also call 105 with any welfare concerns related to a power cut, or if you are worried about the safety of over or underground electricity cables or substations.
105 is free of charge and will put you through to your electricity network operator. You can call 105 from most landlines and mobile phones.
It was launched in September 2016 and will be available to people in England, Scotland and Wales.
The powercut105.com website provides people with more information and signposts them to their network operator.