Class 21 and 29

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Fifty-eight Type 2 Diesel-electric locomotives were built by NBL for British Railways, numbered D6100 to D6157.
  • Originally all were powered by a MAN diesel engine rated at 1000hp or 1100hp. These were designated Class 21.
  • Twenty locos were rebuilt with a Paxman 'Ventura' engine rated at 1350hp. These were designated Class 29.
NBL/MAN D6104 on Cowlairs Incline Pilot dutiy, awaits departure from Cowlairs Yard, 30 November 1966 Photo by willy92140

  • D6100-37, built for Eastern Region, moved to Eastfield (65A) in 1960.
    • Red circle multiple working control.
    • Drop-light cab side windows
  • D6138-57, built for Scottish Region, based at Kittybrewster, Aberdeen (61B).




NBL/Paxman 6121 at an SRPS open day at Wallace Street, Falkirk in 1971 Photo by ahred05


The Rebuilt Locomotives

Number Engine Rebuilt at Livery Remarks Date Withdrawn Disposal Date Photo Links
D6100 Paxman 12/1967 St.Rollox BR Blue Central BR symbol 06/10/71 St Rollox Works (Glasgow) 11/1972 Flickr =
D6101 Paxman 12/1965 St.Rollox 2T.Green No front OHL signs 03/08/71 St Rollox Works (Glasgow) 10/1972 =
D6102 Paxman 06/1966 Inverurie 2T.Green 06/10/71 St Rollox Works (Glasgow) 08/1972 =
D6103 Paxman 10/1965 St.Rollox 2T.Green 05/10/71 St Rollox Works (Glasgow) 11/1972 =
D6106 Paxman 10/1965 St.Rollox 2T.Green No OHL signs 18/07/71 St Rollox Works (Glasgow) 07/1972 =
D6107 Paxman 06/1967 St.Rollox BR Blue Cab side symbol 05/10/71 St Rollox Works (Glasgow) 10/1972 Flickr =
D6108 Paxman 10/1967 Inverurie BR Blue 01/05/69 J MacWilliam (Shettleston) 06/1971 Flickr =
D6109 MAN 01/1967 Inverurie BR Blue 06/04/68 J MacWilliam (Shettleston) 01/1969 Flickr 1, Flickr 2 =
D6112 Paxman 09/1966 St.Rollox 2T.Green No front OHL signs 31/12/71 St Rollox Works (Glasgow) 06/1972 =
D6113 Paxman 12/1966 St.Rollox 2T.Green High OHL signs 06/10/71 St Rollox Works (Glasgow) 01/1972 =
D6114 Paxman 02/1966 St.Rollox 2T.Green No OHL signs 05/10/71 St Rollox Works (Glasgow) 09/1972 =
D6116 Paxman 07/1966 St.Rollox 2T.Green 31/12/71 St Rollox Works (Glasgow) 05/1972 =
D6119 Paxman 12/1967 Inverurie BR Blue (extended yellow, 08/71) 31/12/71 St Rollox Works (Glasgow) 08/1972 Flickr 1, Flickr 2 =
D6121 Paxman 02/1966 Inverurie 2T.Green 06/10/71 St Rollox Works (Glasgow) 09/1972 =
D6123 Paxman 06/1963 St.Rollox 2T.Green Disc Headcode 21/09/71 St Rollox Works (Glasgow) 10/1972 Flickr, Railscot =
D6124 Paxman 12/1967 Inverurie BR Blue 06/10/71 St Rollox Works (Glasgow) 09/1972 Flickr =
D6129 Paxman 10/1967 Inverurie BR Blue 06/10/71 St Rollox Works (Glasgow) 06/1972 Flickr =
D6130 Paxman 04/1966 St.Rollox 2T.Green No front OHL signs 05/10/71 St Rollox Works (Glasgow) 10/1972 =
D6132 Paxman 12/1966 Inverurie 2T.Green 06/10/71 St Rollox Works (Glasgow) 09/1972 =
D6133 Paxman 05/1966 St.Rollox 2T.Green 31/12/71 St Rollox Works (Glasgow) 07/1972 =
D6137 Paxman 11/1967 Inverurie BR Blue 24/04/71 St Rollox Works (Glasgow) 08/1972 Flickr 1, Flickr 2 =


  • Comparison between St Rollox & Inverurie green loco front ends: <Flickr>

  • Last four Class 29s in service were 6112, 6116, 6119 & 6133.
    • 6116 worked the 17.52 Dundee - Glasgow Queen St passenger train on 06/12/71.
    • 6112 was seen on a ballast train at Larbert on 29/12/71.
    • All four were officially withdrawn on 31st December 1971.

See Also

On Scot-Rail

Other websites:

Created by Dysgraphyk and last modified by him at 19:38, 22 of July 2025.