Bob Mackey from Tampa, Florida did a great deal of the reading, Brian Trevor Forbes (sic?) is the British sounding voice (maybe from Guatemala - time fades the memory), Acts was done by U. V. Glass - long time Gilead instructor, now deceased and a voice in many dramas. Until his passing Glass directed most of the dramas that are recorded. He was great to work with, very kind and unassuming. The Ray Franz reading was later replaced by Forbes I believe.
There was an Awake article some years ago about Mackey's swimming/diving accident that left him injured for life. I looked in my old index but could not find the reference. Mackey, though not a Bethelite, was a darling of the Bethel heavies.