A British father who started a Facebook campaign to find a hit-and-run driver who injured his baby son has tragically realised he was responsible.

Jamie Ellison, a father-of-four from Gloucester, accidentally reversed over his 15-month-old son AJ while driving his daughters to school on Friday, the Mirror reports .

He completed the trip without realising the incident had occurred, and returned home to find authorities treating his son’s injuries.

Mr Ellison then launched a Facebook campaign to find what he assumed was a hit-and-run driver.

“I beg anyone who was on Hester's Way Road between 8:30 and 8:40....doing school runs or catching a bus… to please call the police and help find who did this to my little man,” he wrote.

The incident occurred on Hesters Way Rd, Gloucester, England. (Google)

Local police also appealed for information, but realised Mr Ellison was responsible when they reviewed CCTV footage.

The distraught father expressed his shock and remorse on Facebook.

“Could you imagine what I felt like then knowing I nearly killed my own son completely unaware that I was responsible?” he wrote.

“Yes it was me. I just didn't see him or feel a bump… so imagine how I feel right now to be told that I accidentally ran over my own son. Think about that.

“That guilt will be with me forever.”

His baby son was treated for his injuries at Gloucestershire Royal Hospital before returning home.

“The little man is recovering well and young enough to forget this day,” Mr Ellison wrote.