Why does the National Grid issue and then cancel electricity warnings?
Briefly

The National Grid sent out a surprise alert at 2.33pm on Tuesday afternoon declaring the imminent possibility of an electricity supply shortfall as the colder weather begins to ratchet up British energy consumption, only to then cancel the warning just as swiftly.The UK network operator issues these types of notification, known as capacity market notices (CMN), whenever it is concerned about having insufficient surplus electricity capacity available.
Read at www.independent.co.uk
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