More than ten thousand diamonds will be on display at Buckingham Palace this year during it's annual summer opening.
They're set into works acquired by British monarchs over the course of three centuries.
Among the works in the exhibition is the Delhi Durbar Tiara, which is on display to the public for the first time.
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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.