The 58-year-old TV builder is facing a criminal investigation for causing ‘actual bodily harm’ following the altercation.
Tommy, who shot to fame on the garden make-over show alongside Alan Titchmarsh and Charlie Dimmock, was released on bail on Sunday (31 Jan).
Tommy Walsh appeared on 'Ground Force' between 1997 and 2005
The incident occurred on Friday night as Tommy returned from his local pub in Hackney, East London with his son.
“They came out into the street at me aggressively. I felt threatened and there was an altercation.
“Afterwards one of the guys was bleeding a bit so I got him a plaster.
“I thought that was the end of it but 20 minutes later I had the police here. I thought it was a joke.”
Tommy with his former 'Ground Force' presenting team, Alan Titchmarsh and Charlie Dimmock
A police spokesman said: “Officers attended and found a man in his 30s suffering from an ear injury following an altercation with two men.
“He was taken to hospital for a check-up but was not seriously injured.
“One man aged in his 50s was later arrested on suspicion of ABH and taken to a local police station for questioning.
“He has since been bailed to a date in mid-March. The investigation continues.”