Indian locomotive class HP

The Indian locomotive Class HP (Heavy Passenger) was a 4-6-0 broad gauge passenger steam locomotive introduced in 1906 on the railways of British India. It was one of the BESA locomotives developed by the British Engineering Standards Committee, and was first catalogued in the BESA report on standard locomotive classes of 1907. The locomotives were delivered to various railways, though only the Indian States Railways called them the HP class, and they were built by several British manufacturers, including the Vulcan Foundry, Robert Stephenson and Company, North British Locomotive Company, Kitson and Company and William Beardmore and Company. They had two outside cylinders, a Belpaire firebox and Walschaerts valve gear, a later superheated version was classified HPS, and three HPS locomotives have been preserved.