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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Thousands of protesters have swarmed into the US capital and cities across the world to march for gun control.
The tech firm has submitted proposals for 13 emojis depicting wheelchair users, bionic arms, guide dogs, hearing aids and walking sticks.
Cloudy and damp across much of England and Wales, although the rain should turn lighter and more patchy by the afternoon.