Update from BBC news
The main bits of the article are the driver's account of the accident
Mr Bell, 61, said his grand-daughter told him he coughed before he lost consciousness in the crash.
"I was stationary and my grand-daughter said I coughed and the next thing I knew I'm coming round and I'd been unconscious and upside down," he told BBC Wales.
"I haven't a clue what happened. Luckily my grand-daughter came round before me. She just has tiny minor cuts. She had the sense of mind to undo her seatbelt and reach over and undo mine and we then dropped."
Mr Bell suffered cuts and bruises in the crash in the village of Rhoose near Barry at 08:50 BST on Thursday, and has some stitches to his forehead.
He has been helping police who are not treating the incident as deliberate.
and a fantastic response from one of the parents
Matthew Roymon, who lives opposite Mr Bell and whose daughter was injured, said he believed it was a "freak accident" and he did not blame Mr Bell in any way.
Mr Roymon said the incident "could've happened to anyone", while he also praised the response of the emergency services, parents and the school as "second to none".
The brakes on my car broke yesterday as I did the school run so this has had a huge impact on me. Just a split second can change your life. I hope all involved recover quickly.