Millions in Great Britain could face emergency power cuts at short notice

Exclusive: Grid operator Neso can now respond with rolling blackouts as last resort without need for government powers

Millions of households could face power cuts at short notice under new rules to help the electricity system operator avoid widespread blackouts when energy supplies run low.

The changes, which come into effect this week, will make it easier for the national electricity system operator to call for rotating blackouts at short notice if power supplies are running short.