‘Time running out’ to save historic Derbyshire mills and museum ‘Time is running out’ for an historic Derbyshire mills building – and the museum within it could be forced to close, the charity which runs it fears. Friday, 2nd July 2021, 11:44 am The Belper North Mill Trust, which runs a small museum and visitor centre on the site, says the historic complex has been “sadly neglected” for years. It says “Belper deserves better” and that there needs to be a solid commitment to repairing the listed Mill complex and retaining its public use for future generations. The charity is concerned that if this is not done, the Derwent Valley Mills area – running from Derby up to Matlock along the river – could be stripped of its World Heritage Site status, as is currently the risk in Liverpool.