The oil executives who control the world’s most traded commodity are usually the big draw at the annual International Petroleum Week conference. But this week, it could be the leaders in gas that steal the limelight. For years, only scant attention was paid to the gas sector at major industry gatherings, with it very much viewed as a second-string market lacking international intrigue or global clout. Oil is bigger than all the other commodity markets combined and the industry has always carried itself with an almost dismissive swagger. Now there is a clear shift under way. As the electric car revolution takes hold and governments turn to greener fuels to power growing economies, gas and renewable energy is increasingly challenging oil as the headline act. IP Week has long attracted thousands of oil traders, executives and government officials to a whirlwind of events and parties at five-star hotels in Mayfair. This year it has given over a full day — out of three — for gas and cleaner fuel experts to address the primarily oil-focused audience, in a trend at industry events that many see as a reflection of a broader shift within the energy sector. Keun-Wook Paik of the Oxford Institute for Energy Studies, and an adviser to the conference says they were responding to feedback from an oil industry that is grappling with its long-term future, including threats from rival fuels.