Britain's aging electricity grid stands at a crossroads familiar to many modernising nations: the infrastructure of yesterday struggles to carry the energy of tomorrow. In September 2026, the National Audit Office warned that a £70 billion programme to rewire the nation for renewable power is falling dangerously behind, with only 16 of 80 critical projects complete. If the pace does not quicken, the hidden costs of an unprepared grid — payments made simply to manage its own shortcomings — could add £7.8 billion a year to household bills by 2030. The transition to clean energy remains possible,