Terry Molloy
From Tardis Wiki, the free Doctor Who reference
Terry Molloy (born 1947) was the third actor to portray the character of Davros (following Michael Wisher and David Gooderson). He also played Russell in Attack of the Cybermen.
In the episode (DW: Remembrance of the Daleks), he was credited by the pseudonym Roy Tromelly to avoid giving away plot details. He was the narrator and a contributer to the Davros Connections documentary.
He also reprised the role for various Big Finish Productions audio dramas.