A glazing panel carrying a coating stack comprises in sequence at least: a glass substrate, a base antireflective layer, an infra-red reflecting layer, and a top antireflective layer in which at least one of the antireflective layers comprises at least a) a mixed oxide layer which comprises an oxide which is a mixture of Zn and at least one additional material X, in which the atomic ratio X/Zn is greater than or equal to 0.03 and in which X is one or more of the materials selected from the group comprising the elements of groups 2a, 3a, 5a, 4b, 5b, 6b of the periodic table, and b) a layer which comprises a nitride comprising at least one of the materials Al, Si and Zr. The glazing panel is particularly suitable for heat treatment and incorporation in vehicle windscreens.