Complex sentence: The town now has a newly built hospital, funded by the Private Finance Initiative, which left the old hospital derelict in the town centre, it has since been pulled down and redeveloped into a mix of flats, houses and two retail units.
Split into simpler sentences: The town now has a newly built hospital, funded by the Private Finance Initiative. The old hospital in the town centre has since been pulled down and redeveloped into a mixture of flats, houses and retail units.