Geograph - photograph every grid square

A London rarity. A former silk mill, complete with cupola, built c1820 by "a manufacturer, Stephen Wilson, in an attempt to convert the Spitalfields silk-weaving industry to the factory system." The mill's buildings were subsumed into P.B. Cow's India Rubber Works (as in Cow Gum) early in the C20th. Much of the site was demolished in 1989 prior to conversion to a supermarket (by David Gibson Architects). Grade II listed. It is within the Streatham Common Conservation Area.
Now Sainsbury's.