Ukraine has survived a second winter of attacks on its energy infrastructure, but with Russia still actively targeting power plants and transmission systems, what can be done to guarantee power supply at a time of war? Reporting by Laurence Walker, Deputy Editor-in-Chief, Montel. Contributors: Svitlana Grynchuk, Ukrainian Deputy Energy Minister; Dmytro Sakharuk, Executive Director, Dtek; Yuriy Onyshkiv, Senior Gas Analyst, LSEG.