I've been going through the same route for over 4 years now, so you can call me a seasoned rider on these side of the woods. Don't let this accident get to you though, as it can happen to the most seasoned of us too... in fact it happened to me too a couple of months ago just after sun in the sands roundabout going towards the traffic lights on shooters hill road. As i was passing stationary queue of cars, some biker suddenly pulled through between two busses and as it was early morning, i was still half awake.
It didn't help that my brakes were shot and in need of a change, or that it rained previous night and the road was like sheet ice. a good few meters later i was lying on the wrong direction on the road looking at my bike which kept on sliding another 10 meters after i stopped. Luckily the other direction was empty as i slid because of the traffic lights being red ahead...
For me all was fine apart from a bit of bruises but i have to say, these yamaha panels must be made of kevlar not plastic!
Got up and kept riding as soon as the shakes settled down...
Anyways, don't worry of your bike's scratches. It helps in london in many ways. First off, scum won't want to steal it as there will be more shiny alternatives, and seconly the cyclists/cars keep far away thinking you're either a noob or a maniac, both of which helps

I'll keep an eye out for you in the mornings. What time do you pass through aye gee?