I cannot help you directly but I have Ann COLLIER born c1753 who married in 1775 and died in 1775 and Betty COLLIER born 1787 died 1862 (if they fit into your family I would be interested to know); from the census I know that Ann was born at Chinley.

I checked the IGI for Chinley Independent (batch number C079461) for just the surname COLLIER and a few possibilities came up, a couple of children have Brocklehurst as a middle name too.