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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Low-paid healthcare workers are having to pay the "extortionate" fees to park in front of their workplaces, a study shows.
After a cold start on Wednesday, it will be another day of sunshine and showers across many central and eastern parts.
It is claimed that both police and security services, including MI5, have been prevented from vast pools of data on the social media site.