Shahtoot/Mulberry - white
Morus macroura
 
Also known as the king white mulberry, shahtoot mulberry, Tibetan mulberry, or long mulberry is a flowering plant species in the genus Morus found in Tibet, the Himalayas, mountainous area of Indonesia, and rain forests of Indochina. Amazing sweet fruit with honey like flavour.
 
All grafted, (nb: images are mature fruit trees).