## Facts

- The plaintiff, Performance Cars Ltd, owned a Rolls-Royce vehicle involved in two separate accidents.
- The first accident caused significant damage, making a respray necessary.
- Before the car was repaired, it was involved in a second accident caused by the defendant, Abraham.
- The plaintiff sued Abraham to recover the cost of the respray, arguing that his negligence necessitated the repair.
- Abraham contended the respray was already required because of the first accident and that he did not cause further damage.
- The court was asked to determine if Abraham was liable for the cost of repairs related to pre-existing damage.

## Issues

1. Whether a defendant can be held liable in negligence for damage that existed prior to their negligent act.
2. Whether Abraham's negligent conduct materially contributed to any additional harm beyond pre-existing damage.
3. Whether the "but-for" test for causation was satisfied in attributing liability to Abraham.

## Decision

- The Court of Appeal held that Abraham was not liable for the cost of the respray.
- The respray was already needed due to the first accident; Abraham's actions did not create or aggravate the damage.
- The "but-for" test was not satisfied, as the repainting would have occurred regardless of Abraham's negligence.
- The plaintiff's claim for the cost of the respray was dismissed.

## Legal Principles

- The "but-for" test determines causation by considering if the harm would have occurred but for the defendant's conduct.
- Liability in negligence arises only if the defendant’s act is a material cause of the damage.
- A defendant is not liable for pre-existing damage or harm that would have occurred regardless of their actions.
- Clear distinction must be made between pre-existing and new damage when assigning liability.

## Conclusion

The case established that a defendant in negligence is not responsible for pre-existing damage; liability hinges upon proof that the defendant’s conduct made a material difference to the claimant’s loss. The decision clarified causation rules in cases involving sequential accidents or multiple causes of harm and remains an important authority in English negligence law.


Performance Cars Ltd v Abraham [1962] QB 33