Metropolitan Railway electric locomotives

A black and white image of an electric locomotive hauling at least 6 coaches, shown with the electric locomotive on the right. There is an track in the foreground that is electrified with the fourth rail system, the locomotive is shown with two pickup shoes.
Metropolitan-Vickers electric locomotive and train on the Metropolitan Railway in the 1920s

Metropolitan Railway electric locomotives were used on London's Metropolitan Railway with conventional carriage stock. On the outer suburban routes an electric locomotive was used at the Baker Street end that was exchanged for a steam locomotive en route (latterly at Rickmansworth).

Locomotive change at Rickmansworth, Metropolitan Line, August 1960

The first ten had a central cab and were known as camel-backs, and these entered service in 1906. A year later another ten units with a box design and a driving position at each end arrived. These were replaced by more powerful units in the early 1920s.

The locomotives were withdrawn from passenger service in 1962 after electrification reached Amersham and the A Stock electric multiple units entered service. One locomotive, No. 5 John Hampden, is preserved as a static display at London Transport Museum, and another, No. 12 Sarah Siddons, has been used for heritage events.