The electricity transmission arms of National Grid and SP Energy Networks (SPEN) have agreed to pay £158 million in redress for a two-year delay to the £1.2 billion Western Link project – a subsea power line connecting Scotland and Wales. Ofgem said the delay to the 2,250MW high voltage direct current link prevented renewable generators in Scotland from exporting electricity to England and Wales when the transmission network was congested, raising costs for consumers.