The UK Court of Appeals ruled on trigger of coverage issues in a consolidated appeal of cases involving underlying personal injury litigation arising from exposure to asbestos, in light of employers liability policies that generally cover liability for injury “sustained” during the policy year in question. The opinion discusses the unique long latency of mesothelioma, a cancer caused by exposure to asbestos, but which typically does not manifest into disease for as long as forty years or more. The court held generally that the insurer on the risk at the time of exposure — not the time of manifestation of the disease — is responsible for the liability. The ruling is grounded in industry custom, but addresses recent conflicting precedents, generally arising from differing policy wordings over time. The court distinguished a prior ruling, Wasa Int’l Ins. Co. Ltd. v. Lexington Ins. Co., [2009], which involved a conflict between the plain language of a reinsurance contract and a presumption arising from industry custom that insurance and reinsurance cover the same risks, and which ultimately applied the plain policy language as written, despite the presumption. Nevertheless, the court distinguished the Wasa case, noting the varying policy wordings in the employers liability policies at issue. It also recognized the consequences of its ruling on reinsurance liabilities and wordings as well, which it noted have likewise varied over time. Employers’ Liability Insurance “Trigger” Litigation, [2010] EWCA Civ. 1096 (U.K. Court App. Civ. Div. Oct. 8, 2010).