A NASA scientist has told the Associated Press that social media reports of a meteor on the US east east seem to be consistent with the behaviour of a meteor shower.
Donald Yeomans, manager of NASA's Near-Earth Object Program in California, said: "it's unusual to have so many people see it."
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The chancellor now faces the prospect of forming a minority government or calling for a snap election.
The 73-year-old said a return is unlikely "given the politicised atmosphere that seems to have afflicted our set."
Chancellor Philip Hammond said the UK will make a financial proposal to the EU in the next three-and-a-half weeks.