Complex sentence: Morton continued to manage the Hall until 1897? when competition from a newly opened 3000 seat theatre in nearby Deptford, together with ever demanding County Council safety requirements, made the Hall unprofitable and Morton sold it.
Split into simpler sentences: Morton continued to manage the Hall until 1897? when a. Competition from a newly opened 3000 seat theatre in nearby Deptford, together with ever demanding County Council safety requirements, made the Hall unprofitable and Morton sold it.