Mary Reynolds
From Tardis Wiki, the free Doctor Who reference
Mary Reynolds played Queen Elizabeth II, uncredited, in Silver Nemesis. (DWM 244)
Reynolds, who has been described as a being a lookalike of the monarch, went on to play her more times in other films and television series. Following the Queen's death on 8 September 2022, Reynolds announced that she would be retiring from the role, out of respect.[1]