According to The Island of Sodor: Its People, History and Railways, the Slate Quarry near Skarloey was taken over by the Ministry of Defence for the storage of ammunition after its closure. The MoD uses their own engine to shunt in the sidings, a black electric-powered engine described as "beetle-like." Due to the highly secretive nature of its work, the engine has never been seen, and its basis is unknown.
|Other Sudrian railways|
|Bill and Ben • Neil • Sodor and Mainland Railway Numbers 1 and 3 • "Coffee Pots" • Wellsworth and Suddery Railway Tank Engines • Midland Railway Engines • The Little Blue Tank Engine • Mavis • Skarloey Funicular Railway • Ministry of Defence Engine|
|Stephen • Millie|
|Victor • Sidney • Little Barford • Silver • The Old Tram Car • The Pier Train • The Cable Car • The Dark Green Tank Engine • The Little Blue Engine|