Britain’s grid operator, NESO, forecasts about £4 billion in transmission constraint costs in 2027. In 2025-2026, nearly 75% of those costs were used to secure replacement energy, mainly from gas, while 28% of wind north of the B6 boundary in Scotland was curtailed. Flexible Bitcoin mining could consume some of this surplus electricity, but it would not necessarily eliminate the need for replacement supply in southern Britain. The business case would depend on the connection location, service qualification and actual reduction in overall system costs, with the first deliveries under the proposed mechanism scheduled for 2028.
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