I was on the motorway this morning and a car kept swerving into my lane. I had to use the horn and when I looked the driver was looking and texting on his mobile phone. He saw that I had saw what he had been doing. It shook me up that someone was so dangerous at 70 mph. He slowed right down and then decided to catch me up at the exit which I didn’t like. I got the car reg and could see on his dashboard that it was a car with a red and white number plate being taken to a dealership. I could not get the red and white plate details. Is it possible to report this? I just find it dangerous that he was doing this.