Stuart Organ, the longest-serving actor in iconic BBC children’s show Grange Hill, has died. He was 72.

Organ died earlier this week, his reps confirmed to the BBC. They said he “died peacefully at home after a short illness.”

Organ was the longest-serving cast member in Phil Redmond’s Grange Hill. He joined in 1988 and played Mr Robson, a PE teacher.  In 1998, he landed the headmaster’s job, but he left the series in 2003 soon after production of the show transferred to Liverpool.

Grange Hill has made the careers of many a British star. It ran for 40 years virtually uninterrupted on the BBC and ended in 2008. Redmond is now forging a film version helmed by Sara Sugarman.

Organ’s other credits included Brookside, Doctor Who, The Bill and London’s Burning. He moved into theater in later life, landing roles in An Englishman Abroad and The Comedy of Errors.

According to the BBC, Organ is also a familiar voice to London Underground tube passengers, announcing stations, lines, late arrivals and telling users to mind the gap.