A wind turbine (10) comprising: a rotor (12), the axis of rotation extending longitudinally through said rotor (12); a plurality of blades (18) mounted to the rotor (12) to drive the rotor (12) in response to an airflow: and an airflow deflector (30) located for directing airflow through the rotor (12) to increase the efficiency of the turbine (10). The airflow deflector (30) is located inward of the blades (18) which have a fixed pitch relative to the centre of rotation of the rotor (12). Airflow deflector (30) is located around the centre of rotation of rotor (12). The blades (18) also are aerodynamically configured to provide lift due to airflow behavior through the rotor (12) and airflow deflector (30).