The Bachmann Branchline Class 20/3 was first released in 2021, and since then we’ve improved this stunning model further by fitting marker lights at the cab ends, meaning that when operated prototypically as pairs nose-to-nose, a full complement of lighting can now be enjoyed at either end of the formation. Forming a pair of models in original DRS Blue livery is No. 20310 ‘Gresty Bridge’.
This latest generation Bo-Bo diesel locomotive from Bachmann Branchline brings the classic BR Class 20 right up to date, capturing the subtle lines of these distinctive locomotives whilst sporting the modern look of the Class 20/3s – which had their ends made flush during refurbishment and fitted with Wipac light clusters and multiple working connectors. The high level of detail is brought to life by the intricate livery application, whilst the powerful drive mechanism, Plux22 DCC interface and a full suite of lighting offers the perfect complement to the model’s good looks.
 
Bachmann Branchline OO Scale
Era 9
Pristine DRS Blue livery
Running No. 20310
Named ‘Gresty Bridge’
Etched Nameplates Included
Equipped with a Plux22 DCC Decoder Socket – recommended Decoder item No. 36-570B
Length 190mm
 
DETAIL VARIATIONS SPECIFIC TO THIS MODEL
GPS Aerial
One-piece Radiator Shutter
Early Fluted Bogie Equalising Beam (nose end) / Late Fluted Bogie Equalising Beam (cab end)
Blanked Speedo Drive
 
BACHMANN BRANCHLINE CLASS 20 SPECIFICATION
MECHANISM:
Five pole, twin shaft motor with two flywheels providing drive to both bogies
All axle drive
Electrical pickup from all wheels
Separate metal bearings fitted to each axle
Diecast metal chassis block and bogie towers
Diecast metal gearboxes, with gearing arranged for prototypical running speeds and haulage capabilities
16.5mm (OO gauge) wheels to NEM310 & NEM311 standards with authentic profile and detailing
Detachable coupling pockets to NEM362 standards fitted to each bogie
Designed to operate on curves of second radius (438mm) or greater
DETAILING:
Bogies constructed from multiple components featuring full relief detail
Rotating radiator fan (un-motorised)
Separately applied metal detail parts, including handrails, grab handles, sand pipes and etched fan grilles
Sprung metal buffers
Body-mounted snow ploughs supplied with each model
Each model supplied with a full set of decorated, model-specific bufferbeam pipework and accessory parts
LIGHTING:
Directional lighting, switchable on/off at either end on DCC or Analogue control
Day/Night Mode, selectable on DCC or Analogue control
Cab lighting, switchable on/off on DCC or Analogue control
Authentic light colours and temperatures selected for each model based on era and application
DCC:
Plux22 DCC decoder interface
LIVERY APPLICATION:
Authentic liveries applied to all models
Multiple paint applications employed on each model using BR and corporate specification colours
Logos, numerals and text added as appropriate using multi-stage tampo printing using authentic typefaces, logos and colours
In addition, where applicable Etched Nameplates and Plaques are also provided
 
CLASS 20/3 HISTORY
The British Railways Board's (BRB) 1955 modernisation plan called for a change to alternative forms of traction and manufacturers were asked to produce trial or initial designs for evaluation. English Electric adapted an existing design based on an export model for a 1,000bhp diesel and 20 were built as a pilot scheme for assessment. 
The first batch was built in 1957 and the diesels were assigned to work from Devon's Road depot, East London. The design was a success from the start and by 1962 a total of 127 had been built. Following assessment of all the Type 1 diesels, BRB placed a further order increasing the total to 228 by 1968 and the design became the BR standard for 1,000bhp diesel locomotives. With the introduction of TOPS the locomotives were designated Class 20 and renumbered 20001 to 20228. The locomotives were principally designed for freight work but also saw service on summer passenger trains where train heating was not required. The Class 20s worked over the Eastern, London Midland and Scottish regions as well as into Wales and were commonly associated with coal traffic. The only drawback the Class had was its single end cab, unlike modern designs that have a cab at each end. BR resolved this problem by regularly operating the Class 20s as pairs, nose to nose, and with the combined power of 2,000bhp they were able to haul the heavier block freight trains. 
BR's decision to switch to Type 5 and in particular Class 60 diesels in the late 1980s started a gradual withdrawal of the fleet, with just 28 left by 1994. A tribute to the design is that after 45 years the Class is still in service with DRS on mainline duties following refurbishment, the resulting locomotives being designated Class 20/3s. At least 28 of the class are now preserved.