The Duke of Edinburgh faces a fourth day in hospital as he recuperates following exploratory abdominal surgery.
Philip, who is 92 tomorrow, was admitted to the London Clinic on Thursday following a garden party at Buckingham Palace and underwent the procedure on Friday.
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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.