Prison officers from across the region who had walked out earlier have now ended all protest meetings.
They were highlighting their opposition to the Government's plans to link the normal pension age with the state retirement age.
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The suspects were arrested by West Midlands Police and will appear before Westminster Magistrates' Court in London on Friday.
Jon Mitchell has the early morning forecast for Friday.
A 51-year-old man has been convicted of kidnapping his former partner in Sheffield. Police have praised his victim for her bravery .