Century Insurance v NI Transport Board [1942] AC 509
Facts
A petrol-delivery driver was transferring fuel from a tanker when he lit a cigarette and discarded the match. The act ignited petrol and caused an explosion and damage. Litigation concerning the resulting liability required the court to decide whether the driver's conduct was attributable to his employer. Smoking was undertaken for his personal comfort, rather than as an authorised method of delivering petrol. The central question was nevertheless whether, in the circumstances of his ongoing work, that careless act occurred in the course of employment.
Legal Issue
Was the employer responsible for a driver's negligent smoking while delivering petrol, although smoking served the driver's personal comfort rather than the employer's business?
Held
The House of Lords treated the driver's negligence as occurring in the course of employment. He was carrying out the employer's delivery work when he mishandled an obvious ignition risk. The fact that smoking served his personal comfort did not sever its connection with the work being performed. Negligence arose from the time, place and circumstances in which he struck and discarded the match, rather than from smoking considered in isolation. The employer could therefore be responsible for the resulting harm. The supplied export's opening statement denying vicarious liability was inconsistent with the judgment reasoning and has been corrected here.
⭐ Legal Principle
A personal act carried out during employment can amount to a negligent way of performing the employee's work. Century Insurance treated smoking while transferring petrol as sufficiently connected with the delivery, despite the employee acting for personal comfort in lighting the cigarette.
Significance
Century Insurance illustrates why the course-of-employment inquiry cannot be reduced to asking whether each individual movement benefits the employer. An employee may perform assigned work negligently through an incidental personal act. It should be contrasted with a genuinely separate personal venture, while modern intentional-wrongdoing cases also require the close-connection analysis. The case's important teaching point is that smoking during petrol delivery did not automatically remove the driver from the employer's responsibility.
Common exam questions about this case
Why was smoking not treated as a complete departure from employment?
The driver remained engaged in delivering petrol when the careless act occurred. Lighting the match had its dangerous significance because of that work and the fuel being handled. The personal reason for smoking did not make the ongoing delivery a separate private activity unrelated to employment.
Was the employer required to have authorised smoking?
No. Vicarious liability can attach to an unauthorised and negligent mode of carrying out assigned work. Requiring express permission for the wrongful act would defeat much of the doctrine. The relevant question was the connection with the delivery role, not whether the employer approved the careless ignition source.
What would a genuine personal venture change?
If an employee abandons assigned activities for a sufficiently separate personal venture, the required employment connection may be absent. Century Insurance did not involve that conclusion: the driver was still transferring petrol. A problem answer should compare the actual conduct with the entrusted task before classifying it as a departure.