TV weatherman Fred Talbot has been jailed for five years for indecently assaulting two schoolboys when he was a teacher.
Talbot, 65, a regular on the floating weather map of Britain in Liverpool's Albert Dock for ITV's This Morning show, was described at his trial as a "chancer" who used his "boundless energy" and "extrovert personality" to gain the affection and trust of his victims.
Talbot, who was cleared of assaulting three other boys, was sentenced by Judge Timothy Mort on Friday at Manchester Minshull Street Crown Court.
The judge told Talbot: "You deliberately and indecently assaulted the two of them for your own gratification."
Talbot, who sat in the dock wearing glasses and a purple jumper over a shirt and grey trousers, showed no emotion as he was jailed.
He appeared relaxed as he entered the dock and acknowledged people in the packed courtroom.
Suzanne Goddard QC, defending, said there was little that could be said in mitigation.
She said Talbot had lost a stone in weight during his time in custody but was "accustoming himself" to life in jail.
Ms Goddard said: "He knows he must now receive a custodial sentence. He has come to terms with that."
The jury at last month's trial heard that Talbot was "obsessed" with teenage boys throughout his teaching career and "could not help himself" around them when under the influence of drink.
Among the prosecution witnesses at the trial were The Stone Roses' singer Ian Brown who said Talbot gave masturbation practice as homework.
Prosecutors said Talbot's modus operandi was to first establish his "good guy credentials" and then to break down the proper teacher-pupil boundaries, leaving his victims confused as he made his advances.
Talbot, of Bowdon, Greater Manchester, was convicted of two counts of indecent assault in relation to two complainants and cleared of eight counts of indecent assault in relation to three other complainants.
Four of the complainants were teenage pupils at Altrincham Grammar School for Boys, where Talbot taught biology, while the other attended a high school in Gateshead when the defendant was at teacher training college.
The science teacher denied anything sexual or even inappropriate occurred between himself and the Altrincham pupils, while he said sexual activity with the Gateshead complainant only happened when the boy turned 16.
Both of Talbot's victims were assaulted on school canal barge trips in the Cheshire area in the mid 1970s.
Judge Mort told Talbot: "You are a man of 65 with no previous convictions. You have been convicted by a jury from clear evidence of indecently assaulting two boys when you were a teacher."
The judge said both victims had been affected by the abuse by Talbot, with one suffering from mental health issues since the incident.
One of the victims made repeated complaints about Talbot to police before he was charged.
Judge Mort said aggravating features included the degree of planning of the offences, the use of alcohol on the victims and the abuse of trust.
He said: "You calculated the boys would be too confused, guilt-ridden or embarrassed to disclose what happened."
Judge Mort sentenced Talbot to two and a half years for each offence, to run consecutively.
He said he would serve half his sentence before being considered for release on licence.