Method of manufacture of a turbine component

A method for the manufacture of a component having a defined geometry comprising;

• a) defining a pre-component geometry comprising interim shape elements and additional, sacrificial elements for supporting interim shape elements;
• b) on a base plate, depositing multiple layers of a powder comprising a material from which the pre-component is to be manufactured;
• c) sintering the powder to form the pre-component to the defined pre-component geometry;
• d) removing at least some of the sacrificial elements from the pre-component;
• e) subjecting the remaining pre-component from step d) to a HIP step;
• and,
• f) removing any remaining sacrificial elements from the pre-component product of step e) to provide a component to the defined component geometry;
• wherein in the definition of the pre-component geometry, the interim shape elements differ with respect to corresponding final shape elements in the defined component geometry by design, such that during the HIP step, the interim shape elements adjust to form a final, overall shape of the elements in the defined component geometry.