A heatshield for a gas turbine engine, includes a main body having a leading edge, a trailing edge, lateral edges, a first surface and a second surface. The first surface being exposed to a hot working gas in use passing through the gas turbine engine. The heatshield having a leading hook and a trailing hook each extending between the lateral edges, the leading hook and the trailing hook extending from the second surface. A stiffening structure extends from the leading hook to the trailing hook and free from direct contact or attachment to the second surface.