Payments made to generators to manage constraints on the transmission network are forecast to rise to between £1 billion and £2.5 billion per year by the mid-2020s, according to National Grid Electricity System Operator (ESO). The ESO said the costs, which currently amount to around £0.5 billion per year, are then expected fall back down to similar levels by the end of the decade as major new transmission projects come online.
Constraint costs could rise to £2.5bn by mid-2020s
