Chesterfield At end of our day class 20 locomtives 20057 (D8057), & 20154 (D8154) stand at Chesterfield (18.26), as they head onto Derby with the Worksop Open Day Committee 'The Worksop Whistler'., The tour visited Bolsolver Coalite, Welbeck Colliery, Bilsthorpe Colliery, High Marnham and Bevercotes Colliery, along with a whole host of connecting lines and junctions which are history now, victims of the declining coal traffic and pit closures these destinations are now lost to railways., , 28th June 1992