Main Details PDF

TOPS Code/Class:	31/4		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)	LL - Long 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
Parent:	31 (A1A-A1A Diesel Locomotive)
Description:	A1A-A1A Diesel Locomotive
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.
Status:	Current
Date On:	09/1973
Origins:	Reclassified (TOPS)
Date Off:
Destiny:
Key Photo:
Icon:

Sub-codes ?If this code had any sub-codes, they will be listed here.
None found

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

Design	Class	Series	Description	Status
31-4AX	31/4	BR TOPS Loco Design Code	Class 31/4 A1A-A1A Diesel Loco	TBC
31-4BX	31/4	BR TOPS Loco Design Code	Class 31/4 A1A-A1A Diesel Loco	TBC
31-4CX	31/4	BR TOPS Loco Design Code	Class 31/4 A1A-A1A 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 5 batches recorded as being wholly to this TOPS code (including any sub-codes).

Numbers	Class	Design	Type	Qty	Origin	Built/Converted	Date/s	Lot
31400	31/4		Class 31/4 A1A-A1A Diesel Loco	1	Conversion		1988
31401-31419	31/4		Class 31/4 A1A-A1A Diesel Loco	19	Renumbered		1974
31420-31424	31/4		Class 31/4 A1A-A1A Diesel Loco	5	Conversion		1974-1975
31425-31468	31/4		Class 31/4 A1A-A1A Diesel Loco	44	Conversion		1983-1985
31469	31/4		Class 31/4 A1A-A1A Diesel Loco	1	Conversion		1988

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 2 photos of this type (including any sub-codes).

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.
378	31455 (R)	31/4	Unknown	Regional Railways	Leyland Station	13/05/1994		https: / /www.flickr.com /photos /martynhilbert /52633646908 /	Approved, auto/admin Click the ball icon to view the details of the approval status of this note.
383	31421	31/4	Unknown	Regional Railways	Kirkham and Wesham	08/06/1994		https: / /www.flickr.com /photos /martynhilbert /52627045456 /	Approved, auto/admin Click the ball icon to view the details of the approval status of this note.

Listings
There are 133 listings (with 77 distinct numbers) for this TOPS code/class (including any sub-codes).

Notes

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

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Record edited 1 time.

Time / Date	Edited by	Change
09:27 on Tue 29/08/2023	Thomas Young	Key photo added