Beardmore-Halford-Pullinger
The BHP engine
A water-cooled six-cylinder Austro-Daimler engine was enlarged and improved by Frank Bernard Halford, producing the 230 hp (170 kW) Beardmore-Halford-Pullinger (BHP).
This engine was further developed by Siddeley-Deasy as the Puma. This work was done with Arrol-Johnston in Dumfries.