LEADING EDGE STRUCTURE

The invention provides a leading edge structure 420 for providing an aerodynamic surface of an aircraft, the leading edge structure comprising a skin structure 421, the skin structure providing an outer aerodynamic upper surface 421a extending in a chordwise and spanwise direction of the structure, and an outer aerodynamic downwardly curved surface 429 at the front of the upper surface, and an inner surface 421b and a nose stiffening member 430 attached to the inner surface behind the curved front surface and has a depth extending to an inner surface of the leading edge structure. The invention also provides an aircraft wing, aircraft tailplane, wing box structure, wing or wing structure and an aircraft including the leading edge structure 420.