The Speaker's wife has confirmed ITV News' disclosure that she has received a legal letter from Conservative peer Lord McAlpine.
She has reiterated her claim that her tweet was not libellous.
... I don't have money to contest a multi-millionaire. Lord McA falsely accused but not by me...
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Mayor of London Sadiq Khan is backing the scheme.
Sunday will be a fine day across much of Scotland and northern England, with much less coastal mist and low cloud than yesterday.
A spokesperson said the lightning strikes had left the "aircraft fuelling system unavailable."