An aircraft comprising: a fuselage body having a centre-line, the fuselage body extending longitudinally from a nose end to a tail end and the fuselage body comprising a primary support structure which is safety critical structure for transferring forces along a longitudinal extent of the aircraft, the fuselage body comprising a central wing structure to removably secure lateral outer wing assemblies (7, 12) thereto; a single propulsion system comprising at least one engine; mounting means to removably suspend the propulsion system externally from the fuselage body and wherein the mounting means comprises a front mounting assembly and a rear mounting assembly; and wherein the propulsion system comprises an aerodynamic housing which is suspendable from the fuselage body in order to mount the propulsion system external of the fuselage body and along the centre-line of the fuselage body, wherein: the fuselage body comprises an outer skin which encloses a support frame and these form the primary support structure of the aircraft and the propulsion system is located on an external side of the outer skin of the fuselage body such that the propulsion system is not a part of or contained within the primary structure of the aircraft; and in which the primary support structure solely transfers loads within the aircraft and the external mounting of the propulsion system comprises the front mounting assembly which transfers all of the weight of the propulsion system and solely suspends the propulsion system underneath the fuselage body which prevents these loads being transferred around the propulsion system or through the aerodynamic housing of the propulsion system and in which the rear mounting assembly maintains alignment of the propulsion system with the centre line of the fuselage body. a fuselage body having a centre-line, the fuselage body extending longitudinally from a nose end to a tail end and the fuselage body comprising a primary support structure which is safety critical structure for transferring forces along a longitudinal extent of the aircraft, the fuselage body comprising a central wing structure to removably secure lateral outer wing assemblies (7, 12) thereto; a single propulsion system comprising at least one engine; mounting means to removably suspend the propulsion system externally from the fuselage body and wherein the mounting means comprises a front mounting assembly and a rear mounting assembly; and wherein the propulsion system comprises an aerodynamic housing which is suspendable from the fuselage body in order to mount the propulsion system external of the fuselage body and along the centre-line of the fuselage body, wherein: the fuselage body comprises an outer skin which encloses a support frame and these form the primary support structure of the aircraft and the propulsion system is located on an external side of the outer skin of the fuselage body such that the propulsion system is not a part of or contained within the primary structure of the aircraft; and in which the primary support structure solely transfers loads within the aircraft and the external mounting of the propulsion system comprises the front mounting assembly which transfers all of the weight of the propulsion system and solely suspends the propulsion system underneath the fuselage body which prevents these loads being transferred around the propulsion system or through the aerodynamic housing of the propulsion system and in which the rear mounting assembly maintains alignment of the propulsion system with the centre line of the fuselage body. the fuselage body comprises an outer skin which encloses a support frame and these form the primary support structure of the aircraft and the propulsion system is located on an external side of the outer skin of the fuselage body such that the propulsion system is not a part of or contained within the primary structure of the aircraft; and in which the primary support structure solely transfers loads within the aircraft and the external mounting of the propulsion system comprises the front mounting assembly which transfers all of the weight of the propulsion system and solely suspends the propulsion system underneath the fuselage body which prevents these loads being transferred around the propulsion system or through the aerodynamic housing of the propulsion system and in which the rear mounting assembly maintains alignment of the propulsion system with the centre line of the fuselage body.