- Gauge: 2ft 3in
- Configuration: 4w
Mark V is an electric diesel trolley engine that the Thin Controller and Mr. Hugh use to get around the Skarloey Railway.
Mark V is based on the Talyllyn Railway's "Toby".
- There have been five different trolleys used on the Skarloey Railway (Marks I-V), the current one being Mark V.
* RWS only | ** T&F only
||Skarloey | Rheneas | Sir Handel | Peter Sam | Duncan | Duke | Ivo Hugh* | Bertram**
||Rusty | Fred*
||The Ghost Engine**
||Agnes, Ruth, Lucy and Jemima* | Gertrude and Millicent* | Ada, Jane and Mabel* | Saloon Coaches* | Coaches** | Refreshment Coach**
||Trucks | Slate Trucks | Gunpowder Vans** | Quarry Trucks** | Flatbeds* | Conflats | Well Wagons** | Slab Wagons** | V Tipper Trucks*
||Beatrice* | Cora* | Brake Vans | SR Breakdown Train** | The "Weedkiller"* | Art Transporters* | The Sleigh Wagon*
||The Owner (Sir Handel Brown I, Sir Handel Brown II)* | The Thin Controller (Mr. Mack, Mr. Robert Sam, Mr. Peter Sam, Mr. Roger Sam)* | Mr. Hugh (David Hugh I, Ivo Hugh, David Hugh II)* | Sir Topham Hatt**
||Crovan's Gate (Engine Sheds) | Cros-ny-Cuirn | Glennock | Rheneas (Viaduct, Tunnel) | Lakeside | Skarloey (Slate Quarry) | The Depot** | Bluebell Valley** | Valley View** | Sodor Castle** | Standard and Narrow Gauge Tunnel Runby** | Old Iron Bridge** | Tea Room Station** | Strawberry Grove** | Rumblin Bridge** | Elephant Park** | Boulder Quarry** | The Old Wooden Bridge**