The Balancing Services Charging Report (BCR) provides a breakdown of the Balancing Services Use of System (BSUoS) charge. There is a BCR for each run type we calculate a BSUoS charge for - Interim Initial (II), Settlement Final (SF) and Reconciliation Final (RF). It is published each day that we invoice our BSUoS customers. The file is a zip file containing the report in PDF, PRT, DAT and CSV format. These files correspond to the BCRNEW files being published on the website. https://www.nationalgrideso.com/industry-information/charging/balancing-services-use-system-bsuos-charges.