If You Had A Twin, But Didn't Realise...
Family Life1 min ago
No best answer has yet been selected by mrblueboy. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.If you convince the insurers/police that he was driving carelessly or without due care and attention (as his excessive speed would imply) then it can be seen to be the second driver's fault.
If the first driver pulled out infront of a car that was already in that lane (albiet partially) then he may be the one at fault.
I personally think you would need more info re when the second car started braking, how far he was into the lane, whether the crash was partially due to his excessive speed etc.
In many instances, however, insurance companies will agree on shared fault.