The Class 92 is a dual-voltage electric locomotive capable of running on 25kV AC from overhead lines via pantograph, or 750V DC from a third rail. It was designed specifically for operation through the Channel Tunnel between Britain and France and are classified CC 92000 on French Railways. Since introduction in 1993, the fleet of 46 locomotives has been allocated to freight, however six of the class now operate the Caledonian Sleeper service between London and Scotland.