One thousand, four hundred and fifty vehicles were ordered from the North British Locomotive Company, William Beardmore and Company and Metropolitan, to use a 300 hp (220 kW) V12 Ricardo engine instead of the Liberty.
Χίλια τετρακόσια πενήντα οχήματα παραγγέλθηκαν στις εταιρείες North British Locomotive Company, William Beardmore and Company και Metropolitan με 300 hp (220 kW) V12 Ricardo κινητήρα, αντί του Liberty.