Tyres had exceptionally low grip, court hearspublished at 14:49 British Summer Time 17 July
Nelli Bird
BBC News at Merthyr Tydfil Crown Court
The court hears of the significant damage to the car when it was examined after the crash.
Abigail Jackson says an examination of the tyres showed they all had "exceptionally low grip" and were well below the legal limit and "would have virtually no grip in wet conditions".
She says the front-side windows were heavily tinted and "well below the legal limit".
She says this means visibility at night was "severely reduced".