GAS TURBINE ENGINE

A gas turbine engine (10) configured to combust gaseous hydrogen fuel comprises a combustor (20) comprising an annular combustion chamber outer casing (36) surrounding an inner combustor case (34) and a fuel manifold (42) configured to provide gaseous fuel to a plurality of fuel injectors (18). The fuel manifold (42) is formed integrally with the combustion chamber outer casing (36).