In Pictures: Corrie's Kevin teaches Stape a lesson

This is the dramatic moment when Coronation Street's Kevin Webster floors teacher John Stape for having an affair with his daughter.

The sordid affair between secondary school teacher John (Graeme Hawley) and 16-year-old Rosie Webster (Helen Flanagan) is exposed on Christmas Day when John accidentally gives his girlfriend Fiz (Jennie McAlpine) some skimpy underwear meant for Rosie.

After Rosie's mother Sally (Sally Whittaker) slaps her daughter, her father, Kevin, loses his head when he sees John in the Street.

Michael Le Vell, who plays Kevin, explained: "He storms straight out of the door, spots John in the street and punches him straight in the nose. He continues to give him a severe beating while he's on the floor."

John, however, isn't prepared to let sleeping dogs lie and reports Kevin to the boys in blue. Le Vell continued: "John goes straight to the police and grasses Kevin up. He's really shocked when he gets arrested because it's not the first time he's had a fight in the street but he's never had the police show up before – especially not on Christmas Day!"

These scenes will transmit on Christmas Day on ITV1 from 8.30pm.