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Rail Data > Data > Codes > TOPS List > 121
Main Details PDF
TOPS Code/Class: 121
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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) SM - Short Code, Multiple Units
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). 1 - Diesel-Mechanical Multiple Units
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: Pressed Steel Single DMU
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. 55020-55035 plus 54280-54289/56280-56289
Status: Defunct
Date On: c.1974
Origins: TOPS classification
Date Off:
Destiny: Withdrawn
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.
2 designs/diagrams currently listed against this TOPS code/class (including any sub-codes).
DesignClassSeriesDescriptionStatus
DQ221 BR TOPS Carriage Diagram Class 121 Driving Motor Brake Second (DMBS) Defunct
DS201 BR TOPS Carriage Diagram Class 121 Driving Trailer Second (DTS) Defunct
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 Origin Qty Type Built/Converted Date/s Lot
54280-54289r 121 Renumbered 8 Class 121 DTS - 1983
55020-55035 121 New 16 Class 121 DMBS Pressed Steel 1961 30518
56280-56289 121 New 10 Class 121 DTS Pressed Steel 1961 30519
121027-121121 121 Renumbered 0 Class 121 DMU
Notes
No notes have been left yet. ?There may be some notes posted but which have not yet been approved.
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)
Listings
There are 28 listings (with 27 distinct numbers) for this TOPS code/class (not including any sub-codes).
Date ?The date of the listing. Newest listings are shown first. Type ?Listings are either plain listings (reported details at a given date) or changes (changes of details on a given date). Hover over a code for the explanation. Status ?The status of this number at (or after) the given date. Hover over a code for the explanation. Prefix ?The prefix carried at the given date. Hover over a prefix for an explanation. Number TOPS Design Pool Livery Allocation Location Notes ?Shows the approval status of each listing. Hover over an icon for an explanation.
01/01/2019 LListing (e.g. in an ABC) AExtant, Registered, Active
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55034 121 BR green Crewe LNWR Heritage Approved, auto/admin
01/01/2019 LListing (e.g. in an ABC) AExtant, Registered, Active
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121034 121 BR green Crewe LNWR Heritage Approved, auto/admin
05/2000 LListing (e.g. in an ABC) AExtant, Registered, Active
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121027 121 NGBX Silverlink purple/green Bletchley Depot Approved, auto/admin
05/2000 LListing (e.g. in an ABC) AExtant, Registered, Active
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121029 121 NGBX Silverlink purple/green Bletchley Depot Approved, auto/admin
05/2000 LListing (e.g. in an ABC) AExtant, Registered, Active
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121031 121 NGBX Network SouthEast Bletchley Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55020 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55021 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55022 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55023 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55024 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55025 121 DQ221 Laira Depot (Plymouth) Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55026 121 DQ221 Laira Depot (Plymouth) Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55027 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55028 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55029 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55030 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55031 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55032 121 DQ221 Bristol Bath Road Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55033 121 DQ221 Bristol Bath Road Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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55034 121 DQ221 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56280 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56281 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56283 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56284 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56285 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56286 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56287 121 DS201 Reading Depot Approved, auto/admin
01/01/1982 LListing (e.g. in an ABC) AExtant, Registered, Active WAllocated to the Western Region
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56289 121 DS201 Reading Depot Approved, auto/admin
Photos - Internal
There is 1 photo of this type (including any sub-codes).
Photos - External
To be added
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 2 times.
Time / DateEdited byChange
18:09 on Mon 30/05/2022Thomas YoungImproved details
18:09 on Mon 30/05/2022Thomas YoungKey photo added