Complex sentence: On July 8th an era of more than a century will finish, whilst from September the Croham Hurst site will be used as a primary school; with The Limes' grounds being used as a nursery.
Split into simpler sentences: On July 8th an era of more than a century will finish, and from September a new era will begin. The Croham Hurst site will be used as a primary school; with The Limes' grounds being used as a nursery.