, Belper , Heanor , Ilkeston , Ripley (Derbyshire Constabulary HQ), Langley Mill , Alfreton , Chesterfield , Matlock (Derbyshire County Council is based here), Bakewell , Long Eaton , Nottingham , Sandiacre , Beeston , Coalville , Loughborough , Castle Donington , Leicester , Burton-upon-Trent . [ edit ] Economy