This is the fourth time that I have the honour to preface the Union-wide Ten Year Network Development Plan (TYNDP) of the European Network of Transmission System Operators for Gas (ENTSOG). This report illustrates TSOs’ willingness to provide, through ENTSOG, a common platform for the gas industry and institutions to share their knowledge and vision of the future of the European gas market and gas networks. With each edition, ENTSOG endeavours to go beyond regulatory requirements and to deliver analysis bringing real added-value to all stakeholders and decision-mak- ers. This ambition is made more challenging with the entry into force of the TEN-E Regulation and the resulting higher expectations. I like to consider that we have suc- ceeded to a large extent, even if it is difficult to address everyone’s concerns. I am particularly proud of the way ENTSOG has taken up the two main challenges of this edition. First, a high degree of convergence has been ensured between ENTSOG and ENTSO-E, by modelling gas demand for power generation based on the ENTSO-E visions and market data. Secondly, the implementation of the Cost- Benefit Analysis methodology in the TYNDP provides a solid base for the second selection round of Projects of Common Interest. Beyond the positive aspects of the continuous improvement of the report, we should not ignore the implications of its wide and robust assessment. From an infrastruc- ture perspective, market integration has been achieved and is delivering benefits for many gas consumers. Nevertheless, this is not the case for all of them and the completion of the Internal Energy Market is at risk.