DHP1, meaning Diesel Hydraulic Prototype number 1, was a prototype Type 3 mainline diesel locomotive built in 1965 by Clayton to demonstrate their wares to British Railways. It was designed for mixed traffic work, having steam heating facilities for working passenger trains. It was painted red, with the cab area above bonnet-level height painted cream.

Clayton DHP1
Type and origin
Power typeDiesel-hydraulic
BuilderClayton Equipment Company
Build date1965
Specifications
Configuration:
 • UICB'B'
Loco weight56 long tons (57 t)
Prime moverRolls-Royce, 2 off
TransmissionHydraulic
Performance figures
Top speed90 mph (140 km/h)
Power output750 hp (560 kW) × 2
Career
Railroad(s)British Railways
DispositionScrapped