Here you find notes not underlying the Performing Right Society (PRS). Not underlying PRS just means that the composer himself protects the copyright and has not delegated the protection of the
copyright to the PRS. You are allowed to print out the notes you find here and use them for demonstrations and trials free of charge after explicit permission of the composer.
Please agree with the composer on the rendering and performance terms. Should you not find the contact dates on the notes I would love to establish the contact for you.