Yes his insurance was cancelled the day of his conviction. They have agreed to act on his behalf. He has heard from other sources (friends) that the two other drivers have received replacement cars and £3000 each for whiplash. I do not know how accurate that is though.
The insurance letter does not state anything other that a standard sentence reading, 'the third parties have either received injuries or sustained damage to property.
Thank you for your help today. I will still tell my brother to inform the insurance company that he will have to pay in instalments.