Remains of the Stamp End Works.

"Clayton & Shuttleworth was an engineering company located at Stamp End Works, Lincoln, Lincolnshire, England.

The company was established in 1842 when Nathaniel Clayton (1811-1890) formed a partnership with his brother-in-law, Joseph Shuttleworth (1819-83)"

"In 1845 the company built its first portable steam engine, and in 1849 its first threshing machine. These products became the mainstay of its business"

https://en.wikipedia.org/wiki/Clayton_%26_Shuttleworth  

Listed in Kelly's Directory of Lincolnshire 1919 :-

"Clayton & Shuttleworth Limited, agricultural & general engineers & threshing machine makers, Stamp End works. T A "Claytons, Lincoln;" T N 43 (4 lines)"

DB 11 July 2019

Advert appearing in Kelly's Directory of Lincolnshire 1919.

"William Foster & Co Ltd was an agricultural machinery company based in Lincoln, Lincolnshire, England and usually just called "Fosters of Lincoln."

The company can be traced back to 1846, when William Foster purchased a flour mill in Lincoln.

William Foster then proceeded to start small scale manufacturing of mill machinery and threshing machinery.

The mill was converted to an iron foundry by 1856, thus becoming the original Wellington Foundry.

During the First World War they built some of the first tanks for the British Army"

https://en.wikipedia.org/wiki/William_Foster_%26_Co.