Changes

Most of the diesel locomotives are based at the [[Diesel Depot| Kidderminster TMD]] at Kidderminster. However operational diesel locomotives are also stationed at Bridgnorth and Bewdley.

| [[BR Class 08 D3802 | D3802/08635]] || English Electric || 08 || 0-6-0 || [[Severn Valley Railway (Holdings) PLC | SVR(H)]] || British Railways || Stored Undergoing conversion at KidderminsterTMD under the Harrier hydro shunter project.<ref name="Status">For parts retrieval</ref>

| [[BR Class 11 12099 | 12099]] || English Electric || 11 || 0-6-0 || [[Severn Valley Railway Charitable Trust Ltd]] || British Railways || Undergoing overhaul at [[Diesel Depot | Kidderminster Diesel Depot]]TMD.

| [[BR Class 35 D7029 | D7029]] || Beyer Peacock || 35 (Hymek) || [[UIC classification | B-B]] || [[Diesel Traction Group]] || British Railways || Undergoing overhaul at [[Diesel Depot | Kidderminster Diesel Depot]]TMD.

| [[BR Class 37 37308 | 37308]] || English Electric || 37 || Co-Co || || British Railways ||Arrived on SVR 12 July 2020 for completion of restoration at the [[Diesel Depot]]Kidderminster TMD.

| [[BR Class 50 50031 Hood | 50031 Hood]] || English Electric || 50 || [[UIC classification | Co-Co]] || [[50031 Consortium Limited]]. Operated by [[The Class 50 Alliance]] || English Electric Leasing: Leased to British Railways || Operational. Based Under repair at KidderminsterTMD.

| [[BR Class 52 D1013 Western Ranger| D1013 Western Ranger]] || BR Swindon || 52 || [[UIC classification | C-C]] || [[Western Locomotive Association]] || British Railways || Undergoing overhaul at Kidderminster Diesel DepotTMD.

| [[BR Class 52 D1015 Western Champion| D1015 Western Champion]] || BR Swindon || 52 || C-C || [[Diesel Traction Group]] || British Railways || Operational on one engine only. Based at Kidderminster. Main line registered.

From time to time other diesel locomotives visit the Severn Valley Railway for gala appearances or for maintenance. {{As of|2021|8}}, the other main locomotives present at the SVR are as follows:

| [[Clayton Class 17 Bo-Bo D8568 | D8568]] || Clayton || 17 || Bo-Bo || [[Diesel Traction Group]] || British Railways || In the [[Diesel Depot]] for contract maintenanceBased at Chinnor & Princes Risborough Railway.Operational, usually from Kidderminster.

| [[BR Class 33 33108 | 33108]] || BRC&W || 33 || Bo-Bo || Class 33/1 Preservation Company || British Railways || Out of traffic in May 2021 for traction motor replacement, bodywork overhaul & repaint. See [[Diesel Locomotives hired by the SVR]]

| [[BR Class 37 3719040 40106 Atlantic Conveyor|3719040106 Atlantic Conveyor]] || English Electric || 37 40 || Co1Co-Co Co1 || Locomotive Services Limited Class Forty Preservation Society || British Railways ||Arrived on See [[Diesel Locomotives hired by the SVR 12 July 2020 for infrastructure work]]. Operational. Resident at East Lancashire Railway, but moved to the SVR 2 August 2018 as part of a relationship with the Class Forty Preservation Society. Steam heat fitted.

| [[BR Class 40 40106 Atlantic Conveyor|40106 Atlantic Conveyor]] 50008 Thunderer || English Electric || 40 50 || 1CoCo-Co1 Co || Class Forty Preservation Society || English Electric Leasing: Leased to British Railways ||See Arrived on 1 August 2021 for commercial bogie repairs in the [[Diesel Locomotives hired by the SVRDepot|TMD]]. Resident at East Lancashire Railway, but moved to the SVR 2 August 2018 as part of a relationship with the Class Forty Preservation Society in place of the intended hiree 40135. Steam heat fitted.

| 47773 || Brush || 47 || Co-Co || Vintage Trains || British Railways ||In the [[Diesel Depot]] for contract maintenance |-| [[BR Class 50 50033 Glorious | 50033 Glorious]] || English Electric || 50 || Co-Co || Tyseley Loco Works || English Electric Leasing: Leased to British Railways ||Leased by [[Class 50 Alliance Limited]]. Resident at of Tyseley Loco Works, but moved to the SVR 2018 for contract works. First ran at the SVR Autumn Diesel Gala in October 2019Operational.