Cash Flows data from the Trading Operations Report


The page below details highlighted Cash Flows data from the previous month, as highlighted in the Trading Operations Report (TOR). This data is acquired from BSC Agents and inputted to the Trading Operation Monitoring Analysis System (TOMAS) database.

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Party cashflows in the Settlement system

This chart shows an absolute sum of Settlement Cashflow aggregated by Party.



In OctoberTotal Balancing Cashflow increased by £41m to £332m from September 2021; the highest Total Balancing Cashflow on record. Total Imbalance Cashflow decreased by £29m to £409m. Total Residual Cashflow Reallocation Cashflow (RCRC) decreased by £8m to £52m.

Accepted offer cashflow/bid cashflow 

The two graphs in the sections below depict the cash flow associated with accepted bids and offers by Period and Fuel Type. It provides an insight into how much balancing actions cost and how the amount is influenced by the time of day and type of BMU used for balancing. Positive values on either graph reflect cost to the system (i.e. payments made to BSC Parties). Negative values show payments made by BSC Parties.

Accepted offer cashflow by period and fuel type


The highest Offer cashflows seen in November 2021 occurred during Settlement Period 38 (£2.9m); 84% of the Offer cashflow in this Settlement Period went to Gas BMUs, with a further 6to Pumped Storage BMUs and 5% to Coal BMUs.

Accepted bid cashflow by period and fuel type


The lowest net Bid cashflow occurred during Settlement Period 42 (-£1.4m). Wind, Hydro and Other were the only fuel types to have a positive Bid cashflow (£247,414, £3,510 and £2,931 respectively).

Unpaid BSC Charges

The graph in below shows the amount of BSC Trading Charges that have been unpaid by BSC Parties. When BSC Trading Charges are left unpaid following the failure of a BSC Party the outstanding amount is mutualised by the remaining BSC Parties. The share each BSC Party pays of the outstanding amount is determined by the Default Funding Share.

The cumulative number of Suppliers that have had a Supplier of Last Resort are also shown for context.


During November, there were five failing BSC Parties assigned SoLRs bringing the cumulative total number of SoLRS in the past 14 months to 29.  

The total unpaid Trading Charges from the failing Suppliers in November were £9m, a decrease of £21m from October which had the highest monthly total of unpaid Trading Charges on record.


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