Amidst the European Union's long-distance race towards strategic autonomy, European gas system operators are strengthening their control over infrastructure, from the pipes through which natural gas is transported to the underground storage facilities where fossil fuel is kept available for the winter months, when demand soars. Specifically, Enagás, the Spanish manager of gas infrastructure in the State, and its French counterpart, Teréga, have taken a step forward in this direction, after reaching an agreement for the former to acquire 31.5% of the French operator's share capital.