Abstract: A vertical take-off and landing aircraft, and a control method for the aircraft, are disclosed. The aircraft has a vertical motion mode and a forward thrust mode. The aircraft comprises an airframe, having a wing section; a forward thrust means, for use during the forward thrust mode; a vertical lift rotor system, the rotor system being housed in a portion of the airframe; and a rotor control component configured to, during forward thrust, actuate the rotor system to modify the aerodynamic flow around the portion of the airframe housing the rotor system. Forward thrust may occur during the forward thrust mode, or other flight modes, such as transition phases to/from vertical motion and forward thrust modes. Modification of the aerodynamic flow may be used to optimize the aerodynamic flow around the portion of the airframe housing the rotor system.