Norway's Vaar Energi has again postponed the startup of its North Sea Balder X oil and gas project, planning to begin output in the second quarter of 2025 rather than by the end of this year, the company said on Wednesday.Plagued by cost overruns and delays, Balder X had originally been set to start production in 2023 but this was later postponed to the third quarter of 2024 and subsequently to the fourth quarter of this year…