Complex sentence: Alterations at Hainault included a new island platform on the west side to allow the bulk of services via Gants Hill to terminate here and allow access to Hainault Depot, to the north of the station, the major depot on the eastern end of the line.
Split into simpler sentences: Alterations at Hainault included a new island platform on the west side of the station to allow the bulk of services via Gants Hill to be terminated here as well as allowing access to Hainault Depot. This, situated to the north of the station is the major train depot on the eastern end of the line.