Satus Locomotive Services (SLS) is a company that operates on the network. According to the company, they store, refurbish, preserve and convert rolling stock for use in Dovedale. The company also provides freight work and track work.
Satus Locomotive Services is currently based at the SLS Maintenance Yard in the Cosdale area of the map.
A new shed for the yard is currently in the progress of being constructed and will be delivered at a later date due to delays.
Current Fleet
| Photo | Class | Livery | Name | Notes |
|---|---|---|---|---|
 |
Class 150139 | SLS Pride - EX LNWR Marstem Vale | N/A | Unit is fit for Mainline |
 |
Class 950001 | Network Rail Yellow | N/A | Unit is fit for Mainline |
 |
Class
08007 |
BR Blue | N/A | Unit is fit for Mainline |
 |
Class 27112 | BR Green w/o BR Crest | Poppy | Unit is fit for Mainline |
 |
Class
27762 |
Network Rail Yellow | Florence | Unit is fit for Mainline
(LOANED FROM TYLAD) |
 |
Class
27338 |
BR Blue | Crystal | Unit is fit for Mainline
(LOANED FROM TYLAD) |
 |
Class
411757 |
SLS Red | N/A | In Service, sounds are iffy |
 |
Class 37419 | Intercity | Par Signal Box 1880 - 2024 144 Years of operation | Re-entering service soon |
 |
Class
37516 |
West Coast Railways Red | Phoenix | Entering Service Soon |
 |
Class
37716 |
MET Police | N/A | Entering Service Soon |
 |
Class 145069 | Plain Blue (Arriva Trains Wales Blue Doors) | N/A | Unit is fit for Mainline |
 |
Class 92021 | BR two-tone grey | N/A | Unit is fit for Mainline |
 |
Class 58101 | EWS Maroon and yellow | N/A | Out of Service |
 |
Class 58102 | EWS Maroon and yellow | N/A | Out of Service |
Former Fleet
| Photo | Class | Livery | Name | Notes |
|---|---|---|---|---|
 |
Class 145101 | Arriva Trains Wales | N/A | SCRAPPED |
Future Fleet
SLS is currently waiting for 150255 to leave Transport for Wales, for delivery to be carried out, and for testing to begin. The group is also awaiting 350135 to get its powerpack installed and interior refurbishment to be completed. Additionally, the company is also waiting for a Class 66 to be delivered from GBRF once a loco overhaul is completed.