Ex Weatherman Fred Talbot, has admitted to molesting a 10th victim.
Talbot has had more prison time added to his sentence for abusing boys at a grammar school that he taught at in 1980.
Talbot admitted to sexually assaulting a pupil in a biology class.
He is currently serving 5 years for abusing 2 boys at the school, and in May he was given another 4 years after he abused 7 more boys on a camping trip.
Stone Roses singer Ian Brown gave evidence as he was a former pupil of Talbot, he was not a victim.
Talbot was charged with 1 count of sexually assaulting a 16 year old boy in 1990.