Got hit on Tower Bridge

I was cycling northbound over Tower Bridge today at around 10am when a driver decided to overtake me. He didn’t leave enough space and hit me with his wing mirror, causing me to fall off my bike.

He then drove off without stopping. I was shaken, but luckily I only have some scratches and bruises. Traffic was backed up on the bridge, so I managed to catch up with him, blocked his way with my bike and asked him to get out of the car. He said it was an accident, then drove over my bike and drove away.

I have his number plate and footage of me speaking to him. I would really appreciate any advice, as well as any witnesses who may have seen what happened.