Method of making a reconfigurable wind turbine blade mould

A method of making a mould assembly for a wind turbine blade half shell, the method comprising:

• providing an elongate mould plug at a first location, the mould plug having a profile corresponding to part of a profile of a wind turbine blade half shell;
• forming a mould skin section on the mould plug;
• providing a frame structure on top of the mould skin section on the plug and attaching the frame structure to the mould skin section to form a sub-assembly comprising the mould skin section and the frame structure;
• removing the sub-assembly from the mould plug;
• transporting the sub-assembly from the first location to a blade manufacturing facility;
• and
• arranging the sub-assembly end to end with one or more further sub-assemblies at the blade manufacturing facility to form a mould assembly for a wind turbine blade half shell having a first geometry, wherein
• the frame structure comprises one or more main frame modules releasably connected to an intermediate support structure, and wherein the method comprises connecting the intermediate support structure to the mould skin section, the method further comprising reconfiguring the mould assembly at the blade manufacturing facility such that the mould assembly is suitable for making a wind turbine blade half shell having a second geometry that is different to the first geometry, wherein reconfiguring the mould assembly comprises detaching the intermediate support structure of the sub-assembly from the one or more main frame modules, removing the mould skin section and the attached intermediate support structure from the mould assembly, providing a different mould skin section attached to an intermediate support structure, and connecting the intermediate support structure of the different mould skin section to the one or more main frame modules.