Electrification had been considered by the Met as early as the 1880s, but such a method of traction was still in its infancy, and agreement would be needed with the District because of the shared ownership of the Inner Circle.
Elektrificering havde været overvejet af Met så tidligt som 1880'erne, men sådanne traktionsmetoder var stadig tidlige i sin udvikling, og ville kræve en aftale med District på grund af det delte ejerskab af den indre cirkel.