If you have an accident on the road, you must stop and exchange details. If you continue your journey without stopping, for any distance, an explanation will be required.
I represented a driver recently who had driven a considerable distance after being involved in a road traffic accident. The explanation he gave to the Redhill Magistrates did not persuade them that his actions were justified.
The law requires you to stop after an accident. If you are found guilty of this offence, disqualification is discretionary or 5-10 penalty points can be endorsed on your license. If serious damage is caused or there is evidence of bad driving, custody can be considered.