Complex sentence: There is also an officer branch of the organisation at RAF Cranwell in Lincolnshire and the Royal Navy has a branch at Gosport in Hampshire at HMS Sultan, which also houses the Defence College of Electro-Mechanical Engineering.
Split into simpler sentences: There is also an officer branch of the organisation at RAF Cranwell in Lincolnshire. The Royal Navy has a branch at Gosport in Hampshire at HMS Sultan, which is also headquarters of the Defence College of Electro-Mechanical Engineering.