https://www.radiotimes.com/tv/drama/demon-headmaster-reboot-terrence-hardiman/
Original Demon Headmaster Terrence Hardiman will return in new reboot | Radio Times
Bodyguard actor Nicholas Gleaves is assuming the role of the Demon Headmaster for the reboot, but Terrence Hardiman will appear in an upcoming episode
demon headmasterterrence hardiman
https://www.radiotimes.com/tv/drama/nicholas-gleaves-to-play-the-demon-headmaster-as-show-returns-to-cbbc/
Demon Headmaster reboot: Nicholas Gleaves to star as show returns to CBBC | Radio Times
The classic series is being revamped for a new version coming to iPlayer