Colin Gregg, the son of the founder of the Greggs bakers chain, has been jailed at Newcastle Crown Court for 13 and a half years for indecently assaulting four boys.
Gregg, 75, helped to build up the family business in the 1960s before becoming a teacher, headteacher, social worker and charity boss.
The grandfather was found guilty of nine counts of indecent assault following a trial earlier this month at Leeds Crown Court.
The jury had heard how Gregg, of Homefarm Steading, Gosforth, Newcastle, assaulted the boys, who were aged between 11 and 14 at the time, over three decades, from the early 1960s to the 1990s.
The court heard how Gregg was once headteacher at The King’s School Junior School, in Tynemouth, and also taught at Durham School.
He also worked as a social worker in Newcastle.
Gregg denied all the charges, claiming he was the victim of a “witch hunt” and that the complainants were looking for compensation.
After the verdicts, Judge Robin Mairs granted him bail, but said that jail was “inevitable”.