GWR 4073 Class 5080 Defiant

GWR 4073 Class 5080 Defiant is a steam locomotive. It was originally built as Ogmore Castle in May 1939 at Swindon Works, the engine being one of the many popular GWR Castle Class. Its first shed allocation was Old Oak Common.

GWR 5080 Defiant
Defiant parked up around the turntable.jpg
Defiant is sat waiting for 5043 to be moved off its turntable road prior to being taken back to the shed
Type and origin
Power typeSteam
DesignerCharles Collett
BuilderGWR Swindon Works
Build dateMay 1939
 • Whyte4-6-0
Gauge4 ft 8+12 in (1,435 mm)
Leading dia.3 ft 2 in (0.965 m)
Driver dia.6 ft 8+12 in (2.045 m)
Length65 ft 2 in (19.86 m) over buffers
Width8 ft 11 in (2.718 m)
Height13 ft 1 in (3.988 m) (Cut back from 13 ft 4+12 in (4.077 m))
Loco weight79 long tons 17 cwt (178,900 lb or 81.1 t)
89.4 short tons full
Tender weight47 long tons 6 cwt (106,000 lb or 48.1 t)
53.0 short tons full
Fuel typeCoal
Fuel capacity6 long tons 0 cwt (13,400 lb or 6.1 t)
6 long tons 0 hundredweight (6.10 t; 6.72 short tons)
Water cap.4,000 imp gal (18,000 l; 4,800 US gal)
 • Firegrate area
29.36 sq ft (2.728 m2)
BoilerGWR Standard Number 8
Boiler pressure225 lbf/in2 (1.55 MPa)
Heating surface:
 • Tubes
1,857.7 sq ft (172.59 m2) (Collett)
1,799.5 sq ft (167.18 m2) (Hawksworth)
 • Firebox162.7 sq ft (15.12 m2) (Collett)
163.5 sq ft (15.19 m2) (Hawksworth)
CylindersFour (two inside, two outside)
Cylinder size16 in × 26 in (406 mm × 660 mm)
Valve gearInside cylinders: Walschaerts
Outside cylinders: derived from inside cylinders via rocking bars.
Valve typePiston valves
Loco brakeVacuum
Performance figures
Maximum speed25mph - (heritage railways) 45mph - (mainline, tender first) 75mph - (mainline, chimney first)
Tractive effort31,625 lbf (140.68 kN)
OperatorsGreat Western Railway
British Railways
Power classGWR: D
BR: 7P
Axle load classGWR: Red
WithdrawnApril 1963
Current ownerTyseley Locomotive Works


The shed locations of 5080 during her career with the GWR & BR on particular dates.[1]

Shed allocations
Location Shed code From
Old Oak Common PDN 25 May 1936
Cardiff Canton CDF August 1940
Swindon SDN 9 January 1941
Cardiff Canton CDF 20 March 1941
Swindon SDN 16 August 1949
Cardiff Canton CDF (86C) 13 September 1949
Landore 87E December 1955
Llanelly 87F September 1961


Prior to 5080's transfer to Cardiff Canton from Swindon, the engine was renamed Defiant in January 1941, commemorating one of the many types of aircraft which had taken part in the Battle of Britain. The engines original name Ogmore Castle was also used on an earlier member of the class as well as being later used by two sister engines, the name was originally allocated to 5056 before being renamed Earl of Powis in Sept 1937. Following 5080's renaming the name was transferred to 7007 (later renamed Great Western in Jan 1948) & 7035.

British RailwaysEdit

After the arrival of the Britannia class Pacifics on the Western Region of British Railways, in 1959 it was moved to Carmarthen, staying there until its final move to Llanelli in May 1961.

Withdrawal and PreservationEdit

It was withdrawn in April 1963, and acquired by Woodham Brothers scrapyard in Barry, Vale of Glamorgan, South Wales in October 1963.[2]

It was sold to the Standard Gauge Steam Trust (since renamed Tyseley Locomotive Works), initially as spare parts for 7029 Clun Castle, and left as the 62nd departure from Barry in August 1974. Its restoration was completed in June 1988, and it ran for a number of years, appearing on various preserved lines such as the Llangollen Railway Easter 1996. After its boiler certificate expired, it was sent to be displayed at the Buckinghamshire Railway Centre, where it remained until May 2017 when it was returned to Tyseley.

Defiant is at present stored at Tyseley Loco Works, but makes appearances at Tyseley's open weekends as a static exhibit, and a group called "The Defiant Club" are raising money to fund an overhaul of 5080 Defiant for a return to service on the mainline to work excursion trains.[3][4]


Below are a set of photos showing 5080 during its career with British Railways alongside its time at Barry Island and in preservation.


  1. ^ "5080's shed allocations for GWR & BR". BRDatabase.
  2. ^ Daniel, John (16 April 2013). "The Barry Scrapyard story, part 1". The Great Western Archive.
  3. ^ "5080: Defiant Club". Vintage Trains Ltd.
  4. ^ "The Defiant Club" (PDF). Vintage Trains Ltd.

External linksEdit