I am intrigued by the bruising to the left side of Toyah's face. It looks like she has been hit.
If she hit her head on the window of the car during the crash, it would have been on her right hand side.
My guess is that Imran has confessed everything. She, as so often happens in tv/films, has turned her head toward him, staring at him in shock and hasn't been watching the road, and that's why the car crashed into the building without the brakes being applied.
I don't want to go down the route of Imran hitting Toyah, maybe because she threatened to go to the police or something, because it's too out of character, I think. But how else are they going to explain those bruises.
I also think Kelly is acting too guilty to not have some part in all of this too.