PM086: Difficulties in meeting the current year ahead data submission timelines in STCP11-1

Over the last few years improvements to customer information via Grid Code notifications has led to improvements and clarifications to items within the STCP but has also received feedback from generators about the volume of change with the plan. The number of new generation connections, network reinforcement and asset modernisation projects since BETTA go-live has increased the volume of network outages required to be submitted by the Transmission Owners. This volume increase is leading to difficulties for the TOs and SO in meeting the current year ahead data submission timelines as specified in STCP11-1 and outage change requests.