Built: M.E.R, Derby Castle, February 1926
Trucks:February 1926-April 1942: Milnes Series 3 (Milnes Frames)
April 1942-Current: Brush Type ‘D’
Overhauls/Modifications:
April 1942: General Overhaul, Trucks Swapped from Milnes Series 3 to Brush Type ‘D’
1962: Wagons Sides and Ends Removed
1977: Overhaul, with 2 Challenger 1600PW Cranes (1600kg/3520lbs) fitted
Summer-Winter 2000: Challenger Cranes removed, Two Ballast Hoppers Fitted
Autumn 2001: Ballast Hoppers Increased in Height
November 2008: Ballast Hoppers Removed, Air Braking fitted (work undertaken by RMS Locotec at Dumbells Row)
Liveries/Repaints:
1926-1942: Grey with Grey ‘M.E.R’ and ‘No.21’ Lettering
1942-1977: Grey with No Lettering
1977-Summer 2000: Red with No Lettering
Summer 2000-November 2008: Yellow/Black with White M.E.R Lettering
November 2008-Current: Yellow/Black with No Lettering
