Method of manufacture

A method of manufacturing a component comprises providing a base plate (136, figure 2) having a member 32 reversibly connected thereto and forming at least a portion of the component 34 directly on the member using additive layer manufacturing. The additive layer manufacturing method is preferably powder bed additive layer manufacturing. The member may be a tool and the method may include post-processing the component using the tool to locate and hold the component in a rig or machine during post-processing. The member may form a first portion of the component. The first portion is preferably positioned in a recess 38 provided in the base plate and the first portion may be bolted 42 to the base plate. The component may be a flanged component. The component is preferably a metallic component. The method of the invention may form part of a method of manufacturing a gas turbine engine.