The UK increased electricity generation from fossil fuels in 2025 for the first time in four years, as higher natural gas generation had to offset the lowest nuclear power output in decades. The carbon intensity of the UK power grid rose last year, for the first time since 2021, according to data from the system operator compiled by Bloomberg, highlighting the challenge that Britain faces in achieving its Clean Power 2030 goal. The UK government has an ambition to have as much as 95% of all electricity coming from low-carbon…