mk1-forum.net

"There’s plenty of circumstantial evidence that BMC was feverishly working on a series of projects to replace the Mini, and battle in a supermini sector that had yet to be defined. The main programmes were Issigonis’ pet project, the amazing 9X, an intriguing ‘barrel car’ that we really don’t know enough about, and various ideas by Roy Haynes including a neat hatchback, that ultimately led to the Mini Clubman. But the idea of a Mini-based Pininfarina-styled hatchback was possibly far more radical than the rest, certainly in a marketing sense of the word."
More on AROnline:
http://www.aronline.co.uk/blogs/blogs/b ... rina-mini/

There is loads of good info on the Ar site .
Have a look at a side view of a 1977 Lancia Berlina saloon . Ring a Bell ?