British Rail Class 370

British Rail's Class 370 tilting trains, also referred to as APT-P (meaning Advanced Passenger Train Prototype), were the pre-production Advanced Passenger Train units. Unlike the earlier experimental gas-turbine APT-E unit, these units were powered by 25kV AC overhead electrification and were used on the West Coast Main Line between London Euston and Glasgow Central. The APT-P is the most powerful domestic train to have operated in Britain, the eight traction motors fitted to the two central Motor Cars giving a total output of 8,000 hp. This enabled the train to set the UK rail speed record of 162.2 mph in December 1979, a record that stood for 23 years.

British Rail Class 370 "Advanced Passenger Train"
In service	1980-1986
Manufacturer	BREL
Family name	APT
Number built	3 trainsets
Formation	14 cars per trainset
Operator	InterCity
Line(s) served	West Coast Main Line
Specifications
Height	3.5 m
Maximum speed	155mph (249 km/h) (Design) 125mph (200 km/h) (service)
Weight	434 t
Voltage	25 kV AC Overhead

APT-P Driving Trailer Second (DTS) unit, in revised APT branding, with a black "mask" around the driver's window.

APT-P Non-Driving Motor (NDM) unit, with high-speed pantograph.