With reference to the Aprilia at the Brooklands sale. This car was sold by Ian Sutherland in 2000, it has since had several owners and is currently owned by European Classic Cars.
http://www.europeanclassiccars.co.uk/index.htmlI had a drive of it this afternoon, it is a nice tidy car with good paintwork, showing only a few blemishes, a very good interior, although non original fabric. It drove very well, just as an Aprilia should. There are a few non original lights, but at its guide price and considering one just sold at Retromobile for £36,000 it could be very good value.
The green B20 with the central fog light in the grille is owned by Anthony Armstrong, it has been for sale for a while.