Among the thousands of homes and businesses to have benefitted from the ultrafast rollout is Grade 1 listed Picton Castle in Pembrokeshire.
Ymhlith y miloedd o gartrefi a busnesau sydd wedi elwa o'r broses o gyflwyno band eang cyflym iawn, mae Castell Picton yn Sir Benfro, sy'n adeilad rhestredig Gradd 1.