On 16 February 2016, the US District Court for the Eastern District of Louisiana issued a landmark decision with respect to responder immunity. As part of the litigation over the oil spill by the oil rig Deepwater Horizon in the Gulf of Mexico on 20 April 2010, MDL No 2179 (ED La, 16 February 2016), the court granted the clean-up responder defendants’ motions for summary judgment with respect to most of the claims asserted against them by plaintiffs who engaged in a variety of clean-up activities and were exposed to oil, dispersants and other chemicals while doing so as a result of actions or omissions relating to the defendants’ use of dispersants and other response efforts during the Deepwater Horizon...