There had been a terrible queue for the tunnel (south bound, from London to Kent) and I was trapped in almost static traffic for about an hour. When I actually got to the tunnel it was jammed with slow moving traffic. Half way through there was a horrible sight. A car on fire with flames shooting out, seemingly from the front offside wheel arch. The tunnel was getting filled with dense black smoke. There was no going back because I was ahead of dense traffic that could not turn round or back up. I was frightened that the car would explode so I decided to risk it and drove straight through with flames from the car licking the nearside of my car. Fortunately the paint work on my car wasn't damaged, but I have no idea what happened to the dense traffic behind me. According to press reports both sides of the tunnel were shut as a result of the fire which happened at about 9pm.