Who is Shamima Begum and what are her prospects of returning to UK?

Shamima Begum said when she was found that she hoped to return to the UK but did not regret her decision to join IS. Photograph: BBC

The court of appeal’s decision due on Friday on whether Shamima Begum, who travelled to Syria to join Islamic State as a child, was unlawfully stripped of her UK citizenship is the latest step in a long-running battle she has fought against the government. Here is the history of the case and why it has attracted so much publicity.

Who is Shamima Begum and what did she do?