We do not support vault to vault transfers at this time. Metals purchased in one vault location can only be stored in that vault; however, you can take delivery from any vault with minimal restrictions.
For example, if you buy bars for storage in the Zurich vault, you must store them in Zurich until you sell or have them shipped to your address of record (and you may change your address of record if you'd like to take delivery at a different location, including an overseas location). You cannot buy bars in Zurich and have them shipped to London for storage.