The Queen has been helping the National Theatre celebrate its 50th anniversary. The theatre opened its doors in 1963 with the Hollywood star Sir Laurence Olivier as its first director and over the decades has staged 800 productions.
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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.