I was a "Saurday Girl" in 1966 as I was still at school. I worked on the ground floor in skirts. I remember Miss Winspear but I don't know what her position was. My mom used to work at C&A (coats an' 'ats!) in the mid-40s and Miss. Winspear worked at C&A then.
I don't think C&A was actually in Corporation Street, although maybe there was an entrance. The main entrance was in the arcade, next to where Henry's used to be. C&A moved to Corporation Street and then the store became Beaties. No idea what it is now.