Found it!!!
It was Eddie Perkins' Perkins Special built in 1950 around Lancia engine, transmission and suspension parts on a bespoke chassis so it could be rear engine.
It was rebuilt, after some racing derangements, by John Hickford who changed the engine to an Austin engine in Healey 100 spec and renamed it ‘Lancia Austin Special’. One of Hickfords other changes, which we can see in the photo, was to replace the Lancia transverse leaf spring at the rear with "coil-over-shocks" so although the engine isn't visible it must be Hickford's version of the car.
All this assumes the article from JUST Cars of 07/09/2012 is correct of course.