A teenager who killed his cousin by throwing a single punch has been jailed for four years.
Martin Maughan died after being struck on the jaw by Jason Reilly.
Mr Maughan of Norfolk Grove, Church, fell back in the street, hitting his head on the pavement following a row in a Blackburn pub.
He died four days later in July.
The death of 26-year-old Mr Maughan was said to have devastated his family and friends. He had recently become the head of the family following the death of his father.
Mr Reilly, 19, of Morley Avenue, Blackburn had pleaded guilty to a charge of manslaughter following the incident in Blackburn.
CCTV footage of the incident was played at a sentencing hearing before Preston Crown Court.
The court heard that Mr Maughan had earlier been involved in a scuffle with an uncle at the Kings Inn pub in the Mill Hill area of Blackburn.
Mr Francis McEntee, prosecuting, said a group of family and friends had been drinking together. It was in good spirit, but later singing may have been the spark for arguments that followed.
The defendant was not involved in scuffling, pushing and shoving that occurred, he said.
Later on Reilly got out of a taxi and called at a takeaway where he saw his cousin.
He walked over and punched Mr Maughan, who was taken completely by surprise.
Mr Daniel Prowse, defending, said that while in the takeaway, the teenager overheard something about the earlier incident.
Mr Prowse said: "There was no intention to kill or seriously harm his cousin. He fully expected Martin Maughan to get straight back to his feet, following the punch.
"It was an unintended tragedy. He is deeply remorseful and would do anything to undo the harm he caused. He can’t get over what has happened."
He said it was a chance meeting that led to the assault.
In passing sentence, Judge Stuart Baker told Reilly: "In one moment, Mr Maughan had been walking, with the rest of his life to look forward to. A moment later his life was, in effect, over.
"In my judgement, this was mindless, pointless, gratuitous violence by you on a man not expecting trouble", he told Reilly.
"This type of violence is a depressingly familiar feature of life on the streets in busy town centres at this time."
He sentenced Reilly to four years youth custody.