The premiere of the first film in The Hobbit trilogy is being held in Leicester Square tonight. The movie which is subtitled An Unexpected Journey stars Martin Freeman and Sir Ian McKellen.
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Police have released an e-fit of a man suspected of attacking her.
The force has been tweeting after carrying out a series of dawn raids.
Adenike Akingbogun made the dangerous manoeuvre after ignoring the crossing lights and driving onto the tracks.