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.



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.

The Other fuel type category consists of Virtual Lead Party (V_), Supplier (2_) and additional Supplier (C_) BM Units which have no registered fuel type. For more information on BM Unit types see the ‘How are BM Units Categorised?’ webpage.

Accepted offer cashflow by period and fuel type



Accepted bid cashflow by period and fuel type


The high number of wind bid actions led to NGESO taking negative bid actions to limit wind generation to keep the system balanced.

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. Failed BSC Parties have ceased trading and are identifiable in the graph below using their BSC Party ID.

There are also unpaid Trading Charges from BSC Parties that have not ceased trading. These Parties are grouped under BSC Party ID ‘ANON’ so that the pulication of their unpaid Trading Charges does not negatively impact their ability to trade.

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


During February, there were no further failing BSC Parties assigned a SoLR.
The total unpaid Trading Charges from the failing Suppliers in December were £0.28m.

This graph and accompanying Excel files have been updated to provide more information following an Open Data Request to publish more information on Default Funding Shares (Data Request ID: DR343096). The BMRS Change Board (BCB) approved various data items related to DFS to be published under a BSC Open Data Licence and there were no appeals to the BCB’s approval. 

Elexon has included all of the data items made in the original request for BSC Parties that have ceased trading within the Excel files.  The data items are:

Data Item



Company Name

BSC Party ID

Unique character string for identifying BSC Parties

BSC Default Effective From Date

Date the Supplier is considered a ‘Defaulting Party’

SoLR Appointed Date

If applicable, the date a replacement Supplier was assigned through the Supplier of Last Resort (SoLR) process

Current DFS (£)

Monetary total of Monthly and Annual Default Costs

Customer Numbers

Customer numbers represented by the total half hourly and non-half hourly meter counts

As the data relating to DFS is published following an Open Data Request, the data items provided in this visualisation and csv files are provided under a BSC Open Data Licence.


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