The 49-year-old 'Careless Whisper' singer is still being treated in hospital and officers investigating the incident are keen to establish exactly what happened, having already spoken to the car driver, reported Daily Mirror.
"We have definitely not spoken to the 49-year-old male," a police spokesperson said.
Police sources said the accident was still unexplained and far from cut and dried, with motoring experts saying it would be very, very difficult to fall out of the vehicle, which was travelling at around 70 miles per hour.
"He did suffer a couple of bumps and bruises to the head and that's why they are keeping him in - to keep an eye on him. He is doing better. He is making good progress and is looking forward to getting out.