The G10 was launched at the 1965 Motor show. In proportions it was similar in size and appearance to the MGB; not surprising really since the MGB was the donor car for the doors and windscreen. However, it was fitted with a Ford V8 289, and went like the proverbial clappers. Unfortunately, only 6 were built but following demand for a more practical version, the 1966 Motor show saw the appearance of the G11, bodily the same (but minus bonnet bulge) but fitted with the MGB engine. Unsurprisingly, given that in this form it was direct competitor, obtaining the components from BL proved erm .... difficult, and only 12 were made by the factory, although a few were made up later by an enthusiast who acquired the leftover chassis (Source - Ginetta - The Illustrated History by John Rose).
So very rare then. At Rougham in August 2006, this caught my eye. It started out as a G11 but has been rebuilt into a G10 fitted with Ford V8 302, and splendid lt looked, too.