RA II-Vauxhall driven by New Zealander Pat Hoare.
Exactly. Another of Hec Green's creations, commissioned by Pat Hoare long before he become pals with Enzo Ferrari. It originally had a Singer engine, which was replaced by the Vauxhall supercharged unit, later still a Zephyr engine, and it eventually became the 260M Zephyr.
Well solved.
BTW Congratulations! You are now an Expert!