A premixed dual fuel burner for a combustion chamber of a turbomachine, the premixed dual fuel burner comprising: - a burner head having a burner head end, - a burner interior elongated along a main axis and having an upstream side and a downstream side, wherein the upstream side is disposed between the burner head and the downstream side and wherein the upstream side is fluidly connected to the downstream side, - a swirler enclosing the upstream side of the burner interior and comprising an inlet section configured to introduce air and a main gas fuel into the burner interior, - a premixing section enclosing the downstream side of the burner interior, wherein the swirler is arranged between the burner head and the premixing section, and wherein the premixing section comprises a burner outlet configured to be arranged with the combustion chamber such that the downstream side is fluidly connected to the combustion chamber, and - an injection component positioned along the main axis and extending from the burner head into the burner interior, the injection component having a burner head side and an injection side and wherein the injection component tapers from the burner head side to the injection side along the main axis, wherein the injection component comprises at least one liquid fuel outlet at the injection side and the injection component is configured to introduce a main liquid fuel into the burner interior through the at least one liquid fuel outlet and wherein the injection side of the injection component is disposed in the burner interior, and wherein at least one of the at least one liquid fuel outlet is at a side of the injection side of the injection component, characterized in that the injection component has a tapering structure and its radial width reduces over an axial distance D by only or less than D/10. - a burner head having a burner head end, - a burner interior elongated along a main axis and having an upstream side and a downstream side, wherein the upstream side is disposed between the burner head and the downstream side and wherein the upstream side is fluidly connected to the downstream side, - a swirler enclosing the upstream side of the burner interior and comprising an inlet section configured to introduce air and a main gas fuel into the burner interior, - a premixing section enclosing the downstream side of the burner interior, wherein the swirler is arranged between the burner head and the premixing section, and wherein the premixing section comprises a burner outlet configured to be arranged with the combustion chamber such that the downstream side is fluidly connected to the combustion chamber, and - an injection component positioned along the main axis and extending from the burner head into the burner interior, the injection component having a burner head side and an injection side and wherein the injection component tapers from the burner head side to the injection side along the main axis, wherein the injection component comprises at least one liquid fuel outlet at the injection side and the injection component is configured to introduce a main liquid fuel into the burner interior through the at least one liquid fuel outlet and wherein the injection side of the injection component is disposed in the burner interior, and wherein at least one of the at least one liquid fuel outlet is at a side of the injection side of the injection component, characterized in that the injection component has a tapering structure and its radial width reduces over an axial distance D by only or less than D/10.