By Charlotte McLaughlin & Lucy Needham Doctor Who’s latest companion has been confirmed after months of speculation about Coronation Street star Millie Gibson leaving the role. Varada Sethu will join Doctor Who as a new companion for Ncuti Gatwa’s second season as a Time Lord. The Indian-born actress, who has had roles in Star Wars spin-off show Andor and the Strike Back series, will join the long-running BBC science fiction programme as a second partner for the 15th Doctor. There had been reports that Sethu would join the cast to replace former Coronation Street actress Millie Gibson, who has…