Rail Data TOPS Code/Class Details

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TOPS Code/Class:	20		Previous	Next
TOPS Category: ?This is my own (unofficial) means to categorise TOPS codes based on what they relate to and whether they are long (4 characters, i.e. including sub-codes) or short (3 characters)	SL - Short Code, Locomotives	In selection ?This works on your last-used TOPS selection, including any filters and sort orders. Buttons will not show if the current TOPS code was not in your last selection, or if you are at the beginning or end of the data set.
TOPS GENKOC: ?The first character of a TOPS code is known as the GENKOC and indicates the general type of rolling stock (e.g. 1xx are DMUs).	0 - Locos	Overall ?This works on the overall TOPS code list without any filtering or sorting applied.
TOPS BRAKTY: ?The third character of many TOPS codes is the BRAKTY, indicating the type of braking equipment fitted (e.g. A indicates air brakes).	* - Not defined by code
Description:	Bo-Bo Diesel Electric Loco
Numbers: ?Numbers are only shown where the ranges were limited. Otherwise, refer to the listings section below. The letter r after the numbers indicates this is a range, with not all numbers in the sequence used.	20001-20906r
Status:	Current
Date On:
Origins:	Reclassified (TOPS)
Date Off:
Destiny:
Key Photo:
Icon:

Sub-codes ?If this code had any sub-codes, they will be listed here.

20/0	Bo-Bo Diesel Electric Loco
20/3 (1)	Bo-Bo Diesel Electric Loco
20/3 (2)	Bo-Bo Diesel Electric Loco
20/9	Bo-Bo Diesel Electric Loco

Designs/Diagrams ?Design codes and diagrams related to this code (and any sub-codes where relevant) are listed here.
9 designs/diagrams currently listed against this TOPS code/class (including any sub-codes).

Design	Class	Series	Description	Status
20-0AV	20/0	BR TOPS Loco Design Code	Class 20 Bo-Bo Diesel Loco	TBC
20-0BX	20/0	BR TOPS Loco Design Code	Class 20 Bo-Bo Diesel Loco	TBC
20-0CV	20/0	BR TOPS Loco Design Code	Class 20 Bo-Bo Diesel Loco	TBC
20-0DX	20/0	BR TOPS Loco Design Code	Class 20 Bo-Bo Diesel Loco	TBC
20-0EV	20/0	BR TOPS Loco Design Code	Class 20 Bo-Bo Diesel Loco	TBC
20-0FX	20/0	BR TOPS Loco Design Code	Class 20 Bo-Bo Diesel Loco	TBC
20-3AA	20/3 (2)	BR TOPS Loco Design Code	Class 20/3 Bo-Bo Diesel Loco	TBC
20-3BA	20/3 (2)	BR TOPS Loco Design Code	Class 20/3 Bo-Bo Diesel Loco	TBC
20-9AA	20/9	BR TOPS Loco Design Code	Class 20/9 Bo-Bo Diesel Loco	TBC

Batches ?Batches of numbers built or converted to this TOPS code are listed below. Note that only codes that were wholly to this code will appear, otherwise refer to the listings section for other numbers.
There are 4 batches recorded as being wholly to this TOPS code (including any sub-codes).

Numbers	Class	Design	Type	Qty	Origin	Built/Converted	Date/s	Lot
20001-20228	20/0		Class 20 Bo-Bo Diesel Loco	228	Renumbered		1974
20301-20308	20/3 (1)		Class 20 Bo-Bo Diesel Loco	8	Renumbered		1986
20301-20315	20/3 (2)		Class 20 Bo-Bo Diesel Loco	15	Renumbered		1995-1998
20901-20906	20/9		Class 20 Bo-Bo Diesel Loco	6	Conversion		1989

Profiles ?Profiles provide an overview of the histories of various types of train. Profiles that are relevant to this TOPS class/code are listed below. If no profiles are shown, try looking under the parent code (in main details section above)

Photos - Internal
There are 13 photos of this type (including any sub-codes). The 10 most recently added are shown below.

Photos - External

ID	Number	TOPS	Design	Livery	Photo location	Photo date	Comment	Source	?Shows the approval status of each photolink. Hover over an icon for an explanation.
341	20198	20	Unknown	BR blue	Dundee West Goods	20/07/1981	Stored with 20028 and 20171	https: / /www.flickr.com /photos /martynhilbert /52689435705 /	Approved, auto/admin Click the ball icon to view the details of the approval status of this note.
435	20148	20	Unknown	BR blue	Stapleford and Sandiacre	30/08/1992		https: / /www.flickr.com /photos /martynhilbert /52464886246 /	Approved, auto/admin Click the ball icon to view the details of the approval status of this note.

Listings
There are 578 listings (with 246 distinct numbers) for this TOPS code/class (including any sub-codes).

Notes
No notes have been left yet. ?There may be some notes posted but which have not yet been approved.

Related Information
To be added

Dimensions ?Dimensions are normally recorded against design/diagram numbers. They can be recorded against batches, lots or TOPS codes if the design/diagram is not available.
There are no dimensions recorded for this TOPS code.

Drawings ?Drawings are normally referenced to specific design/diagram numbers. They can be recorded against batches, lots or TOPS codes if the design/diagram is not available. If no drawings are listed here, try looking at related designs/diagrams (above).
There are no drawings referenced for this TOPS code.

Data History
Record added 01/01/2020 by Thomas Young

Record edited 1 time.

Time / Date	Edited by	Change
12:57 on Tue 29/08/2023	Thomas Young	Improved details