Hi Sue, here,s a map of Plantation square where I think your family lived, go to
Lancashire County Council: Environment Directorate: Old Maps scan down to Accrington and Church put your pointer above the o in Accrington and click, when the map comes up, click above the cc in Accrington and the square which comes up on the enlarged map next to St Pauls is Plantation square, the same one you have the photo of. Clear as mud I know, hope it works.