Branches of the Nationwide Building Society in Ripley, Heanor and Alfreton will close and integrate with nearby branches of the Derbyshire Building Society over a single weekend this winter.
Branches in Ashby, Chesterfield, Ilkeston and Matlock will also be integrated, and ten Nationwide branches in Derbyshire will close, while ten Derbyshire branches will be rebranded as Nationwide.
The Nationwide will not discuss job losses. A spokesman said: “Nationwide aims to retain as many employees as possible, with redeployment to other branches or across the wider business. Where this is not possible, employees will receive training, support and advice on future opportunities.”