Sir Leslie Bancroft

 is the owner of British Imperial Textile Mills. He lives in London, England.

Sir Leslie is a prospective client of McMann & Tate. He meets with Larry and Darrin in Salem, Massachusetts (where Darrin is supposed to be on vacation) to discuss his account. He is a Revolutionary War buff, so Larry gives Darrin a replica Paul Revere teapot to give to Sir Leslie so McMann & Tate can get into his good graces.