Gordon Fielden, the London Regional chairman of the Fire Brigades Union, has been speaking to ITV about the reasons behind the three-year campaign of industrial action the union has been involved in.
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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.