00:00There's a substation about a mile away called North Hyde and that has a big piece of equipment
00:05called transformers and there's three of them. One of them faulted and went on fire. That happens.
00:10Unfortunately it damaged the one next to it which was in essence its standby, its backup.
00:16When that happened power was lost to the whole area. About 60,000 people are connected to that
00:21substation including one Heathrow airport. So at that stage Heathrow lost power. They've actually
00:28got three of their own substations on the site itself, two of which are fed from this North Hyde
00:35substation that was out of action. But that does mean there's one substation remained live, at least
00:40one substation remained live through the whole event and I think that's what the debate through
00:45today has been. On one hand National Grid have quite rightly said well there's enough capacity
00:50at one of your substations to power the whole airport and Heathrow also rightly say well yes
00:55that's true but it does take us hours and hours to reconfigure our whole network to
01:00use that power. So like all these things there's truth on both sides.
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