John Griffiths
From Tardis Wiki, the free Doctor Who reference
John Griffiths (died 9 January 2020[1]) was the uncredited title sequence film editor for the Doctor Who television story An Unearthly Child. (INFO: "The Firemaker"). He was later the film editor for The Dalek Invasion of Earth and was the production assistant for The Mind of Evil, as well as having an uncredited appearance as a UNIT soldier in the latter. (TCH 16)
He was later interviewed by Toby Hadoke on the 203rd edition of Big Finish's charity podcast series Toby Hadoke's Who Round.