A liner and shell assembly for a combustor of a gas turbine engine, comprising: a shell; and a panel at least partially spaced from the shell to form a gap therebetween, the panel having: a first surface and a second surface; a dilution hole at least partially defined by the first surface and the second surface, and extending through the shell and the panel; a first effusion hole and a second effusion hole extending through the panel, each having an inlet located at the gap between the panel and the shell and defined by the second surface, and an outlet defined by the first surface, wherein, the outlet of the first effusion hole is located nearer to the dilution hole than the outlet of the second effusion hole; and a grommet defined by the second surface, wherein the inlet of the first effusion hole and the inlet of the second effusion hole are both defined by the grommet, wherein the inlet of the first effusion hole is located at a same distance from the dilution hole as the inlet of the second effusion hole, characterised in that the outlet of the first effusion hole and the outlet of the second effusion hole are closer to the dilution hole than the inlet of the first effusion hole and the inlet of the second effusion hole, respectively, wherein the first effusion hole forms an angle with the first surface that is less than an angle formed between the second effusion hole and the first surface. a shell; and a panel at least partially spaced from the shell to form a gap therebetween, the panel having: a first surface and a second surface; a dilution hole at least partially defined by the first surface and the second surface, and extending through the shell and the panel; a first effusion hole and a second effusion hole extending through the panel, each having an inlet located at the gap between the panel and the shell and defined by the second surface, and an outlet defined by the first surface, wherein, the outlet of the first effusion hole is located nearer to the dilution hole than the outlet of the second effusion hole; and a grommet defined by the second surface, wherein the inlet of the first effusion hole and the inlet of the second effusion hole are both defined by the grommet, wherein the inlet of the first effusion hole is located at a same distance from the dilution hole as the inlet of the second effusion hole, characterised in that the outlet of the first effusion hole and the outlet of the second effusion hole are closer to the dilution hole than the inlet of the first effusion hole and the inlet of the second effusion hole, respectively, wherein the first effusion hole forms an angle with the first surface that is less than an angle formed between the second effusion hole and the first surface. a first surface and a second surface; a dilution hole at least partially defined by the first surface and the second surface, and extending through the shell and the panel; a first effusion hole and a second effusion hole extending through the panel, each having an inlet located at the gap between the panel and the shell and defined by the second surface, and an outlet defined by the first surface, wherein, the outlet of the first effusion hole is located nearer to the dilution hole than the outlet of the second effusion hole; and a grommet defined by the second surface, wherein the inlet of the first effusion hole and the inlet of the second effusion hole are both defined by the grommet, wherein the inlet of the first effusion hole is located at a same distance from the dilution hole as the inlet of the second effusion hole, characterised in that the outlet of the first effusion hole and the outlet of the second effusion hole are closer to the dilution hole than the inlet of the first effusion hole and the inlet of the second effusion hole, respectively, wherein the first effusion hole forms an angle with the first surface that is less than an angle formed between the second effusion hole and the first surface.