Studies are under way to work out how many are affected - but the figure is thought to be around 137,000 in England and Wales.
Waxaa socota daraasad lagu sameynayo arrintan si loo ogaado tirada haweenka ay saameysay laakiin waxaa loo maleynayaa inay tiradu gaari karto 137 kun marka la iskudaro gobollada England iyo Wales.