Heatwave pushes Great Britain’s grid operator to call for extra electricity from power plants

Neso issues rare summer warning for Wednesday evening, as households turn on fans and air conditioning

Great Britain’s grid operator has released a rare summer power supply warning for Wednesday evening as the heatwave is expected to get more intense, putting pressure on the energy system.

The National Energy System Operator (Neso) issued an electricity margin notice late on Tuesday, asking power plant owners to provide any extra electricity, as the buffer between supply and expected demand comes under pressure.