Speaking about the signing, MD Kevin Mackenzie said: "We are extremely pleased to announce the signing of Demelza; she is a proven soloist and will be a huge asset to the band."
Band Chairman, Nick Sanders, added: "I'm delighted that Demelza, who has done such a fabulous job as a guest player with the band, has been appointed. She is a great talent. Her appointment together with others announced in recent weeks demonstrates our aim to compete at the very highest levels."