UFO Sighting in Wembley, on March 20th 2016 – Thought was plane but realised it was round and disappeared in front of us.

I was with my 11 year old son in the car driving to collect my daughter from work. We turned left on to Bridgewater road in Wembley and i noticed what I thought was a plane but lights were brighter than usual. My radio turned off so was fiddling with my radio when my son pointed at the plane and told me to have a look. I then noticed the lights were in a kind of circle shape. I pulled over, just to check if the plane was at an angle that made it look circular in shape, but it wasn't, the shape was circular. I couldn't quite see the craft itself as it was dark and just an outline was visible.It was not going at any speed like you would expect a plane or helicopter it was sort of hovering but still moving slightly. I carried on driving and went through a width restriction looked up and couldn't see it. I said where has it gone and my son said it just disappeared while he was looking directly at it. Radio came back on and had no problem with it since.