This dataset gives information on the arming and disarming of units contracted under CMIS (previously known as Constraint Management Pathfinder). The information is provided for each instance of arming. Time values are all given in local time in GB. >**NOTE:** Update 10th October 2024: Two changes have been made to the format of the Constraint Management Intertrip Arming 2024-2025 report. 1) From October 2024, all CMIS contracts are now priced on a £/MWh basis. This has been reflected in the ‘Current Arming Fee’ column header. Reports for 2023-24 and 2022-23 will continue to show the ‘Current Arming Fee’ as £/Settlement period which was the previous pricing model for Scotland (B6) 2) An additional column has been included to specify whether the armed BMU has a CMIS contract for Scotland (B6) or East Anglia (EC5)