The UK energy regulator Ofgem has approved a £28bn (€32bn) investment in energy networks, including £17.8bn (€20bn) for Britain’s gas networks and £10.3bn (€11.8bn) for electricity transmission networks (Ofgem press release, 04/12/2025). The £28bn commitment is expected to rise to £90bn (€103bn) by 2031 across both gas and electricity networks, according to the regulator.
“In total £108 (€123) will be added to bills by 2031. £48 (€55) for gas and £60 (€69) for electricity. Alongside maintaining grid resilience this investment will deliver significant savings of around £80 (€91) compared to not expanding the grid.”
Additionally, according to Ofgem, electricity grid expansion alone is expected to reduce bills by £50 (€57) by 2031, thanks to lower reliance on imported gas and the halting of constraint costs, ensuring power flows efficiently from where it’s generated to where it’s needed. “Overall the net increase in bills to cover all costs by 2031 will be around £30 (€34) or less than £3 (€3.4) per month with costs expected to fall further over time.”