Police say they do not have evidence to prosecute a hit-and-run driver who they believe seriously injured a cyclist - despite the incident being captured on video.
The video shows a Volvo following the cyclist around a roundabout in Nottingham city centre before suddenly accelerating forward and knocking him to the ground.
The cyclist, Reginald Scot, posted the footage to YouTube after police declined to prosecute the driver.
Nottinghamshire Police said that although the footage shows the car’s number plate, the fact it was a hire car makes it impossible to prove who was driving.
The investigating officer said they had discovered the hire vehicle had been sub-leased through a number of different companies and had traced the man and woman eligible to drive it, the BBC reports.
They were issued with a formal request to hand over the details of who had been driving that day, but did not respond.
The pair were interviewed and summonsed to court for failing to stop at the scene of an accident, failing to report an accident and failing to respond to a legal request for driver details, but following a review by the Crown Prosecution Service it was decided there was not enough evidence to prove who was driving that day.
Instead, the man wwas fined £150 for failing to provide driver details in connection with the incident in November 2014.
In a post alongside the video, Mr Scott said he had no idea why the driver drove into him but that it took him four months to recover from his injuries.
He said: "I was hit right in the small of my back, I received a severe back injury and internal haemorrhaging from the impact. It took four months for me to recover from my injuries with a further month of physiotherapy to reach normality.
"To this day I have no idea why the driver did this to me, there was no confrontation with any driver prior to the attack, I do not know the driver or the car. I was not riding my normal route at my normal time so I do not think this attack was planned. Just a senseless and brutal attack on a fellow human being."
In a statement, Nottinghamshire Police said: "While we share the victim's disappointment at the outcome, we feel the investigating police officer made every effort to ensure that the occupants of the car were found and brought before the courts".