National Grid Group chief executive John Pettigrew says lessons can and must be learnt following Friday's power cut which left thousands of customers without power. Here, he responds to criticism over its role in the incident.
The government has launched an investigation into the power cut on Friday (9 August) that led to major disruption across the UK's power and transport networks.
Friday's (9 August) major power cut was caused by an issue known to National Grid and could have been prevented, according to an expert from energy storage company Anesco.
Prime Minister Theresa May has announced that the UK has committed to cut greenhouse gas emissions in the UK to almost zero by 2050.