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TOP25 Mid-Season Overview

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The following slides are intended to give an overview of our ongoing TOP25 performance, focusing on the following: Outages that have been completed to date; Why outages have been deferred/cancelled; Any additional work that has been included; Plan for remainder of TOP25

TOP25-Mid-Season-Overview.pdf
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Transmission Outage Summary 2025 (Week 28-29)

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Transmission-Outage-Summary-2025-Week-28-29.xlsx
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Transmission Outage Summary 2025 (Week 30-31)

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Transmission-Outage-Summary-2025-Week-30-31.xlsx
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2025-26 Proposed Transmission Loss Adjustment Factors (TLAFs) Accompanying Note

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2025-26-TLAF-Accompanying-Note-v1.1.pdf
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2025/26 Proposed TLAFs Excel Version

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The proposed Transmission Loss Adjustment Factors (TLAFs) which have been calculated by the TSOs, based on the approved TLAF methodology (SEM-12-049), for 2025/26 (1 October 2025 to 30 September 2026).

2025-26-Proposed-TLAFs-v1.2.xlsx
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2025/26 Proposed TLAFs PDF Version

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The proposed Transmission Loss Adjustment Factors (TLAFs) which have been calculated by the TSOs, based on the approved TLAF methodology (SEM-12-049), for 2025/26 (1 October 2025 to 30 September 2026).

2025-26-Proposed-TLAFs-v1.2.pdf
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Transmission Outage Programme 2025 (Published 1 July 2025)

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2025-Transmission-Outage-Programme-20250701.xlsx
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Transmission Outage Summary 2025 (Week 24-25)

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Transmission-Outage-Summary-2025-Week-24-25.xlsx
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Transmission Outage Summary 2025 (Week 22-23)

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Transmission-Outage-Summary-2025-Week-22-23.xlsx
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​All-Island Transmission System Performance Report 2024

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​This report contains transmission system data and performance statistics for the transmission system in Ireland and Northern Ireland for the year 2024 (1 January 2024 – 31 December 2024).

All-Island-Transmission-System-Performance-Report-2024.pdf
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