Brown & Polson
John Polson was a famous cornflour manufacturer. Born in Paisley in 1825, he attended Paisley Grammar School and the Andersonian College in Glasgow before joining the family business.
John Polson died in 1900. By then, Brown and Polson's were the largest manufacturer of starch products in the United Kingdom. Additional premises were required at Colinslee and Barterholm, and later, a new works was built at Falside Road, where the company remained until it closed in 1996.
Now owned by Unilever.
Source and more: Classic Brands and here.