It seems that those of us who are frustrated by the interface at the U. Leicester's Historical Directories site can now search some of the directories at Find My Past and be frustrated by that search experience instead.
http://search.findmypast.com/search-world-Records/britain-directories-and-almanacs?utm_source=fmp&utm_medium=email&utm_content=939598-A-13-A&utm_campaign=fridays&utm_term=FMP-CAM-Fridays-22416-12-US&dclid=CKqPntDoocwCFYVufgodK-0ATg
http://search.findmypast.com/search-world-Records/britain-directories-and-almanacs?utm_source=fmp&utm_medium=email&utm_content=939598-A-13-A&utm_campaign=fridays&utm_term=FMP-CAM-Fridays-22416-12-US&dclid=CKqPntDoocwCFYVufgodK-0ATg