Court of Appeal officials have confirmed that appeal papers have been lodged by lawyers representing the Home Office.
They said no date had yet been fixed for any appeal court hearing.
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New legislation will mean that only cleaner fuels and stoves will be sold for domestic heating.
Many people do not know the meaning of “best before” - when food might not be at its top quality after this date, but is still safe to eat.
It will be warm and sunny in much of the UK with a risk of heavy, thundery showers for parts of central and southern England and Wales.