This crash was caused by the camera car driver, he should have approached slower and braked sooner. I does not matter the other car was attempting an illegal manouver, the camera car driver was not paying attention and caused the crash; there are no mitigating circumstances in this one.
You appeared to be riding three-a-breast, which to my knowledge is illegal.
But I am not saying this just to hate on on cyclists. Their driving was rubbish..they also appeared to be speeding?