The Peel Godred Branch Line is run using electric locomotives to deal with the heavy aluminum traffic on that line.
No details are given as to the locomotives that first worked the line, but Sodor: Reading Between the Lines states that goods traffic is currently handled by engines similar to the BR Class 86 and 87 and the passenger services are run by electric multiple units.
E1, E2, E3 and E4 are based on Edwardian-styled Bo-Bo locomotives, and the goods engines are said to be similar to the British Rail Class 87. It is unclear if the class 87 style engines replaced or supplemented the earlier ones. There are also some multiple units which work passenger services.