"This area, formerly extra-parochial (Gl. Dioc.) became a civil parish by the Extra-Parochial Places Act, 1857. Since 1935 it also includes (civily) Stanley Pontelarge." (Ref: Guide to the Parish Records of the City of Bristol and the County of Gloucester; I. Gray & E. Ralph, 1963)
You can see the administrative areas in which Prescott has been placed at times in the past.
Select one to see a link to a map of that particular area.