A bronze plaque commemorating six miners who died 150 years ago in an explosion at Westwood Colliery in High Green, Sheffield. The accident helped bring about changes in working practises in the mining industry.
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Her petition is calling to ensure family courts don't allow known abusers to continue having unsafe access to children.
Official consent is needed for structures due to remain place for more than 28 days and the blade is planned to remain until mid-March.
Livermore looks likely to move to West Brom this week and will now hold talks with the club ahead of Saturday's game against Sunderland.