Currently, drivers who are involved in a serious collision in which they think they may be at fault have an incentive to flee the scene. The maximum penalty for failure to stop after an incident is points and a 6-month custodial sentence. Causing death by careless/dangerous driving is between 5-14 yrs.
This petition – https://petition.parliament.uk/petitions/323926 – calls for that anomaly to be righted.
York Wednesday Wheelers 