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Ofgem's Final Determinations for RIIO‑ET3 reveal that TNUoS charges will rise by 60% starting April 2026, with allowed revenue for transmission owners projected to exceed £10 billion by 2030/31. This increase will significantly impact electricity users, particularly data centers, manufacturers, and logistics, with average per meter increases ranging from £17,000 to over £300,000. Businesses are advised to reassess their energy strategies as overall electricity costs are expected to rise by 5 to 10 percent in 2026 to 2027.