Complex sentence: The estate was used by the army during the First World War and Second World War, the structures built during Second World War and still in existence today (2009) were constructed by the soldiers of No.3 Vehicle Repair Depot, part of Royal Army Ordnance Corps.
Split into simpler sentences: The estate was used by the army during the First and Second World Wars. The structures, built during the Second World War and still in existence (2009), were constructed by the soldiers of No.3 Vehicle Repair Depot, part of Royal Army Ordnance Corps.