Britain’s National Energy System Operator requested up to 1,200 MW of emergency electricity from France after an asset’s delayed return.

Britain’s National Energy System Operator (NESO) requested emergency assistance from France on Monday evening. The request was for up to 1,200 megawatts of additional electricity supply through subsea interconnectors to help maintain power-system security.

The reported explanation was a decline in available grid capacity on Monday afternoon because a power-system asset returned to service later than expected. The supplied message does not identify that asset or specify whether it was generation, transmission, or another system component.

The 1,200 MW figure is the maximum requested power transfer, not an energy quantity or confirmed volume delivered. The source does not state the duration, procurement cost, actual imports received, or any associated data-center outage.