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Specifications
Specifications
Configuration:;
• Whyte	0-4-0DM
• UIC	B-dm
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Wheel diameter	3 ft 2 in (0.965 m)
Minimum curve	1.06 chains (21 m) normal; 1.00 chain (20 m) dead slow;
Wheelbase	6 ft 0 in (1.829 m)
Length	23 ft 8 in (7.214 m)
Width	8 ft 5+1⁄2 in (2.578 m)
Height	11 ft 10+1⁄2 in (3.620 m)
Loco weight	25.05 long tons (25.5 t; 28.1 short tons)
Fuel capacity	325 imp gal (1,480 L; 390 US gal)
Prime mover	Gardner 6L3
RPM:
• Maximum RPM	1,200
Engine type	6-cylinder in-line Four-stroke diesel engine
Transmission	Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit.
Loco brake	Straight Air
Train brakes	11503–11506: none; 81: Vacuum;

Type and origin
Type and origin
Power type	Diesel-mechanical
Builder	Andrew Barclay Sons & Co
Serial number	395–398, 424
Build date	1956 (4), 1958 (1)
Total produced	5

British Rail Class 01
British Rail Class 01
	A Class 01 at Holyhead Breakwater
Power type
Type and origin
Power type	Diesel-mechanical
Builder	Andrew Barclay Sons & Co
Serial number	395–398, 424
Build date	1956 (4), 1958 (1)
Total produced	5
Configuration:;
Specifications
Configuration:;
• Whyte	0-4-0DM
• UIC	B-dm
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Wheel diameter	3 ft 2 in (0.965 m)
Minimum curve	1.06 chains (21 m) normal; 1.00 chain (20 m) dead slow;
Wheelbase	6 ft 0 in (1.829 m)
Length	23 ft 8 in (7.214 m)
Width	8 ft 5+1⁄2 in (2.578 m)
Height	11 ft 10+1⁄2 in (3.620 m)
Loco weight	25.05 long tons (25.5 t; 28.1 short tons)
Fuel capacity	325 imp gal (1,480 L; 390 US gal)
Prime mover	Gardner 6L3
RPM:
• Maximum RPM	1,200
Engine type	6-cylinder in-line Four-stroke diesel engine
Transmission	Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit.
Loco brake	Straight Air
Train brakes	11503–11506: none; 81: Vacuum;
Maximum speed
Performance figures
Maximum speed	14.25 mph (22.9 km/h)
Power output	Engine: 153 hp (114 kW); At rail: 102 hp (76 kW);
Tractive effort:;
• Continuous	12,750 lbf (56.7 kN) at 2.63 mph (4.23 km/h)
Brakeforce	15 long tons-force (150 kN)
Operators
Career
Operators	British Railways
Numbers	11503–11506, 81 (departmental); later D2953–D2956; later 01001–01002;
Axle load class	RA 1
Withdrawn	1966–1968 (except D2954–5), 1981
Preserved	D2953, D2956 (1st)
Scrapped	1969, 1982
Disposition	2 preserved, 3 scrapped

The British Rail Class 01 diesel locomotive is a short wheelbase 0-4-0 diesel-mechanical design intended for use in areas with tight curves and limited clearance.

History

Four examples were built by Andrew Barclay Sons & Co. of Kilmarnock (Scotland) in 1956. They were numbered 11503–11506, then D2953–2956, and two survived long enough to become 01001 (D2954) and 01002 (D2955) on the TOPS system.^[1] Their original depot allocation was to Stratford (30A). A fifth locomotive with detail differences was built in 1958 for departmental use at Peterborough Permanent Way Depot. It was originally No. 81 but was renumbered D2956 in July 1967 after the original D2956 had been withdrawn.^[2]

The locomotives were very versatile, despite having only 153 horsepower (114 kW) available, and were small enough to operate on any railway on the BR standard gauge network, limited only by their low top speed of 14+1⁄4 miles per hour (22.9 km/h). They were also very reliable for such a small class, although Stratford Docks, where they originally worked, was not noted for having much use for them. Two examples, D2953 and D2956, were sold in 1966 and a third locomotive (the second D2956) followed in 1968.^[3]

D2954 and D2955 survived in BR service because they were required to service the Holyhead Breakwater, being the only locomotives light enough for that track, the pair were used by William Wild & Sons Ltd.^[4] They were renumbered 01001 and 01002 under TOPS. 01001 was not used after 1973 but was cannibalised for spare parts to keep its sister loco in service. 01001 was withdrawn in 1979, and 01002 followed in 1981. 01002 had last run when the Breakwater Railway closed in July 1980. Both locomotives were cut up on site still carrying their original livery of British Railways black with black-and-yellow "wasp stripe" warning ends and the original British Railways "unicycling lion" emblem; they were the last locomotives in BR service to do so.

Table of withdrawals
Year	Quantity in service at start of year	Quantity withdrawn	Locomotive numbers	Notes
1966	5	2	D2953/56 (i)	Both went into industrial use
1967	3	1	D2956 (ii)	Formerly Departmental No. 81
1968–78	2	0	—
1979	2	1	01001
1980	1	0	—
1981	1	1	01002

Fleet list


Locomotive Number	Withdrawn	Disposition
D2953	1966	Sold to Thames Matex Ltd., West Thurrock,^[5] later preserved
D2956 (i)	1966	Sold into industrial use, later preserved
D2956 (ii)	1967	Scrapped
01001	1979	Scrapped
01002	1981	Scrapped

Technical details

Class 01 locomotives had a Gardner 6-cylinder in-line, 4-stroke 6L3 engine of 153 hp (114 kW) at 1,200 rpm connected to a Wilson SE4, 4-speed epicyclic gear box with a Vulcan-Sinclair type 23 rigid hydraulic coupling, and a Wiseman 15LGB reverse and final drive unit. The wheels were connected by coupling rods and driven by a jackshaft.

Preservation

Two pre-TOPS members survive in preservation:

D2953 by Heritage Shunters Trust at Rowsley South, Peak Rail^[6]
the first D2956 on the East Lancashire Railway^[7]

Re-use of the '01' TOPS code

More recently, the sub-classification 01/5 has come into use to refer to small, privately owned shunters certified to run on the national network. As such, 01/5 is a collective grouping of a number of very different locomotives, having in common only that they are small, hitherto unclassified shunters of designs never given a BR classification.

References

^ Strickland, D.C. (1982). Locomotive directory: every single one there has ever been. Camberley: Diesel and Electric Group. p. 46. ISBN 0-906375-10-X.
^ Marsden, Colin (1981). A pictorial history of the diesel shunter. Oxford: Oxford Publishing. pp. unpaged. ISBN 0-86093-108-0.
^ Strickland, (1982), p.46.
^ Industrial Locomotives of Great Britain 1976. Smethwick, West Midlands: Industrial Railway Society. 1976. p. 231. ISBN 0-901096-27-X.
^ Industrial Locomotives 1982 including preserved and minor railway locomotives. Industrial Railway Society. 1982. ISBN 0-901096-43-1.
^ "Heritage Shunters Trust | www.HeritageShuntersTrust.com | Rowsley|". www.heritageshunterstrust.com. Retrieved 2 October 2021.
^ "ELR Diesel Group - Class 01 D2956". www.elrdiesel.info. Retrieved 2 October 2021.

General references

Marsden, Colin J. (1981). Motive power recognition: 1 Locomotives. Shepperton: Ian Allan Publishing. ISBN 978-0-7110-1109-0. OL 3524380M. Wikidata Q105978222.
Williams, Alan; Percival, David (1977). British Railways Locomotives and Multiple Units including Preserved Locomotives 1977. Shepperton: Ian Allan Publishing. ISBN 978-0-7110-0751-2. OL 15153791M. Wikidata Q105978228.