Journalists working for the BBC in the Midlands have taken strike action in a dispute over compulsory redundancies.
Members of the National Union of Journalists walked out at midnight for 24 hours.
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A prison officer was taken to hospital with minor injuries following a riot at HMP Hewell.
Thousands of people turned up at Wollaton Park yesterday for the festival, which was headlined by Kaiser Chiefs.
Specially-trained prison security teams were sent to HMP Hewell near Redditch, after trouble broke out on one of the prison's wings.