The partners were Stephen Clive and William Lloyd. 

Well Street Pottery or The Old Works. "These works — of old foundation - were formerly carried on by Clive & Lloyd, and, after Mr. Lloyd retired, by Stephen Clive under the style of Stephen Clive & Co. from about 1875 to 1880." - Jewitt's Ceramic Art of Great Britain, revised by G. A. Godden, p142.