The Department for Transport provide example of serious and slight casualties:
Examples of ‘Serious’ injury are:
- Internal injury
- Severe cuts
- Burns (excluding friction burns)
- Severe general shock requiring hospital treatment
- Detention in hospital as an in-patient, either immediately or later
- Injuries to casualties who die 30 or more days after the accident from injuries sustained in that accident.
Examples of ‘Slight’ injury are:
- Sprains, not necessarily requiring medical treatment
- Neck whiplash injury
- Slight cuts
- Slight shock requiring roadside attention. (Persons who are merely shaken and who have no other injury should not be included unless they receive or appear to need medical treatment).