Negligence – Causation. Following the trial of a preliminary issue regarding the defendant's liability to the claimant in respect of her treatment for an infection and her subsequent total knee replacement, the Queen's Bench Division held that the defendant was liable in damages for the claimant having to undergo the total knee replacement in 2008 rather than when she would have been about 49 years old, and liable for the post total knee replacement infection and all of its consequences by way of the further infections and operations and the claimant's resulting disability.