William Blencowe & Co. are different from the other breweries in B15, in that they were based in Northamptonshire, at Brackley. The Blencowe family were certainly brewing there by 1859 (see 1D/30 below), when William and Clement Blencowe were in charge, but it is not yet known when they started there.
By the early 20th century, the business had descended to William Blencowe, and the company began to be called William Blencowe & Co., Ltd.). In 1925, the company was taken over by Halls Oxford Brewery.