Gavin Grey: UK correspondent on the investigations into the Heathrow shutdown

 

New reports have revealed power was available to keep London's Heathrow Airport open throughout the recent shutdown.

Two other substations remained operational and capable of powering the airport - but the shutdown was called due to the time it took to switch from the damaged substation to the other two.

UK correspondent Gavin Grey says this update came as a shock to many people who got stranded.

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