Boris Johnson has been responding to criticism that an airport in the Thames Estuary won't be 'commercially viable'. A study for the commons Transport Committee estimated that the project would need a massive public subsidy. But the Mayor isn't budging on his island idea. Sarah Saunders reports
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Mayor of London Sadiq Khan is backing the scheme.
A spokesperson said the lightning strikes had left the "aircraft fuelling system unavailable."
Nearly 1,000 properties have been left without power, and road users have been warned of potentially hazardous conditions.