In the United Kingdom, the most difficult aspect of proving a medical malpractice claim may be establishing causation-the link between the medical professional's breach of duty and the patient's damages. Because the traditional "but for" test unfairly burdens the plaintiff, a rule such as the "loss of chance" doctrine would be more equitable.
Causation Issues in Medical Malpractice: A United Kingdom Perspective,
Annals Health L.
Available at: http://lawecommons.luc.edu/annals/vol5/iss1/12