Fall in energy demand, caused by the UK Covid-19 lockdown, and high penetration of renewables on the transmission system has seen the activity on the Balancing Mechanism reflected in increased balancing use of system (BSUoS) charges, used to recover the cost of day-to-day operation of the transmission system.

The average half-hourly BSUoS charge in April and May 2019 was £2.82/MWh and £2.56/MWh respectively, before it rose to £4.93/MWh and £5.75/MWh in April 2020 and May 2020, according to Cornwall Insight, the energy consulting company.

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