The gap developed quickly, and the car came through straight away, very hard to spot. If you look at a pot hole or scratch your nose whilst cycling you can easily miss something like this, no matter how good a cyclist you think you are.
My back is feeling bad and thats about it. The front wheel is probably a write off.
My bike has disc brakes and even when i pulled hard on that it wasn't enough to stop in time.
I had exactly the same accident in September on Fulham Palace Road (I was on my 500cc scooter).
Expect anything at a junction when you have no visibility of upcoming traffic. It happens so fast it's often hard to react.
You've been luckier than I was. I may have hit the car at about 5mph after braking and I didn't even fell, but the scaphoid bone on my right wrist snapped under the impact.
Hope that you've recovered, and that your claim will be successful.