Annex 4A.1: Future System Strategy

This annex summarises our over-arching Future System Strategy. It acts as an index to full range of supporting engineering strategies and summarises the network interventions we plan to deliver in RIIO-ED2.

• View Annex 4A.1: Future System Strategy

Annex 4A.2: Load Related Expenditure Strategy: Engineering Net Zero

This is our strategy for creating the network capacity to accommodate our customers’ changing network needs. Including how we will accommodate EVs, heat pumps, and distributed generation.

• View Annex 4A.2: Load Related Expenditure Strategy: Engineering Net Zero

Annex 4A.3: DSO Strategy

This annex is our detailed DSO strategy, it sets out how we are delivering DSO roles, activities, and infrastructure to help manage a more dynamic, decentralised, and interactive energy system.

• View Annex 4A.3: DSO Strategy

Annex 4A.4: Network Asset Risk Strategy

This annex sets out our long-term strategy for managing the health and criticality our network assets, to deliver a safer, more reliable supply with lower environmental impact.

• View Annex 4A.4: Network Asset Risk Strategy

Annex 4A.5: Network Performance Strategy

This annex provides an overview of Network Performance for RIIO-ED2, including the improvements in Customer Interruptions (CI), Customer Minutes Lost (CML) and Worst Served Customers arising from our plans. We also set out our views on the RIIO-ED2 regulatory mechanisms.

• View Annex 4A.5: Network Performance Strategy

Annex 4A.6: DFES

Our Distribution Future Energy Scenarios sets out our forecasts of customer's demand, generation and Low Carbon Technology requirements across a range of future pathways out to 2050.

• View Annex 4A.6: SPD DFES Key Findings
• View Annex 4A.6: SPD DFES – Main Report
• View Annex 4A.6: SPM DFES Key Findings
• View Annex 4A.6: SPM DFES – Main Report
• View Annex 4A.6: DFES Methodology
• View Annex 4A.6: SPD DFES Data Workbook
• View Annex 4A.6: SPM DFES Data Workbook

Annex 4A.7: Climate Resilience Strategy

This annex is our first fully published Climate Resilience Strategy. It sets out how we are assessing the threats to our network arising from climate change, and how we are identifying adaptation requirements to manage these threats.

• View Annex 4A.7: Climate Resilience Strategy

Annex 4A.8: Losses Strategy

This annex is our latest Losses Strategy, refreshed and updated for RIIO-ED2, including our view of losses forecasts. It sets out a summary of the direct and indirect actions we are taking to manage technical and non-technical losses on our network.

• View Annex 4A.8: Losses Strategy

Annex 4A.9: Heat Strategy

This strategy will enable us to support our customers in the switch to affordable, reliable, and clean sources of heating.

• View Annex 4A.9: Heat Strategy

Annex 4A.10: Substations and Switchgear Strategy; EHV to LV

This annex provides an overview of the condition driven interventions we will undertake to manage our substation and switchgear assets (<132kV) in RIIO-ED2. It includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.10: Substations and Switchgear Strategy; EHV to LV

Annex 4A.11: Cable Modernisation Strategy

This annex provides an overview of the condition driven interventions we will undertake to manage our underground cable assets (<132kV) in RIIO-ED2. It includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.11: Cable Modernisation Strategy

Annex 4A.12: Pilots and Light Current Strategy

This annex provides an overview of the asset modernisation we will undertake to manage our protection and light current assets in RIIO-ED2, including relays and pilots. It includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.12: Pilots and Light Current Strategy

Annex 4A.13: OHL and ESQCR Strategy

This annex provides an overview of the asset modernisation we will undertake to manage our overhead line assets (<132kV) and maintain safe ground clearances in RIIO-ED2. It includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.13: OHL and ESQCR Strategy

Annex 4A.14: SP Manweb 132kV Plants and Circuits Strategy

An overview of the Non-load related modernisation activities associated with the SP Manweb 132kV network and assets, planned for the RIIO-ED2 price review period. It includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.14: SP Manweb 132kV Plants and Circuits Strategy

Annex 4A.15: Civils and Flooding Strategy

This annex provides an overview of our condition driven civils, and flood resilience programmes of work for RIIO-ED2. It includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.15: Civils and Flooding Strategy

Annex 4A.16: Operational IT and Telecoms Strategy

This annex details SP Energy Networks’ operational IT and telecommunications (telecoms) investment plan in RIIO-ED2.

• View Annex 4A.16: Operational IT and Telecoms Strategy

Annex 4A.17: Electricity System Restoration Strategy

This annex summarises our Electricity System Restoration strategy for RIIO-ED2. This sets out how we are managing the distribution system risks arising from a black start event and includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.17: Electricity System Restoration Strategy

Annex 4A.18: Legal and Safety (CV14) Strategy

This annex summarises our Legal & Safety strategy for RIIO-ED2. It sets out how we are managing specific legal and safety obligations on our network (captured under the CV14 regulatory category) and includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.18: Legal and Safety (C14) Strategy

Annex 4A.19: Rising and Lateral Mains Strategy

This annex summarises our Rising and Lateral Mains strategy. It sets out our plans to safeguard over 70,000 customers from deterioration of these assets in RIIO-ED2 and includes a summary of the costs, drivers, and benefits of our plans.

• View Annex 4A.19: Rising and Lateral Mains Strategy

Annex 4A.20: Network Operating Costs Strategy

This annex summarises our RIIO-ED2 Network Operating Costs. This includes the day-to-day activities we carry out on the network; from inspecting and maintaining our assets, to our 24/7 fault repairs and vegetation management activities. It includes the costs, drivers, and benefits of our plans. Please note this annex has been redacted as it contains commercially sensitive information.

• View Annex 4A.20: Network Operating Costs Strategy

Annex 4A.21: Network Visibility Strategy

This annex sets out how we will collect, process, utilise and share key network data in RIIO-ED2. This includes the costs, drivers and benefits for monitoring and advanced analytics in our plans.

• View Annex 4A.21: Network Visibility Strategy

Annex 4A.22: LV Services & Cut Outs Strategy

This is our strategy to intervene on the assets connecting customer properties to our network. This is driven by increasing domestic demand and deteriorating asset condition.

• View Annex 4A.22: LV Services & Cut Outs Strategy

Annex 4A.23: EJP and CBA Index

This annex details our full suite of published engineering justification documents. These are the technical and cost appraisals undertaken to develop robust, efficient, and fully justified intervention plans for 100% of our Load and Non-load plans. Please note we have not published any of our Cost Benefits Analysis (CBAs).

Some of our EJPs have been redacted due to commercially sensitive information and information sensitive to the security of our assets. Please note we have not published any of our Cost Benefits Analysis (CBAs).

• View Annex 4A.23: EJP and CBA Index

Engineering Justification Papers

• ED2-NLR(A)SPM-011-TX-EJP – 132kV Auxiliary and Earthing Transformer Replacement
• ED2-NLR(A)SPM-003-UG-EJP – 132kV Cable Refurbishment
• ED2-NLR(A)SPM-008-OHL-EJP – 132kV Overhead Line Tower and Fitting Modernisation
• ED2-LRE-SPD-023-CV1-EJP – 33kV Circuit Upgrades
• ED2-NLR-A-SPM-009-OHL-EJP – 4ZC Route 132kV Overhead Line Modernisation
• ED2-LRE-SPM-004-CV1-EJP – Aberdyfi-Harlech 33kV Reinforcement
• ED2-LRE-SPM-008-CV1-EJP – Acer Avenue Primary Reinforcement
• ED2-NLR-A-SPM-001-OHL-EJP – AG Route 132kV Overhead Line Modernisation
• ED2-NLR-A-SPM-001-TX-EJP – Amlwch 132kV Grid Transformer T1 Replacement
• ED2-LRE-SPD-004-CV1-EJP – Ayton Primary Reinforcement
• ED2-NLR-A-SPM-007-OHL-EJP – BH Route 132kV Overhead Line Modernisation
• ED2-NLR-A-SPM-001-UG-EJP – Bootle - Kirkby 132kV Cable Modernisation
• ED2-LRE-SPM-031-CV1-EJP – Bootle Canal Quarter Regeneration Scheme
• ED2-LRE-SPM-028-CV1-EJP – Brymbo – Hawarden – Holywell 33kV Reinforcement
• ED2-NLR(A)SPEN-005-ENV-EJP – Carbon Offsetting
• ED2-LRE-SPM-002-CV1-EJP – Carrington Fiddlers Ferry 132kV Reinforcement
• ED2-NLR(A)SPM-009-SWG-EJP – Cellarhead 132kV Switchgear Modernisation
• ED2-NLR(A)SPM-003-TX-EJP – Colwyn Bay 132kV Grid Transformers T1 & T2 Replacement
• ED2-LRE-SPM-007-CV1-EJP – Colwyn Bay-Dolgarrog 33kV Reinforcement
• ED2-NLR(A)SPEN-002-RES-EJP – Condition Driven Civils
• ED2-LRE-SPM-001-CV1-EJP – Connahs Quay 132kV Reinforcement
• ED2-NLR(A)SPM-005-OHL-EJP – CU Route 132kV Overhead Line Modernisation
• ED2-LRE-SPD-004-CV3-EJP – Currie GSP Fault Level Mitigation
• ED2-NLR(A)SPM-004-OHL-EJP – DB Route 132kV Overhead Line Modernisation
• ED2-NLR(O)SPEN-001-DSO-EJP – Distribution System Operation (DSO) Infrastructure
• ED2-NLR(A)SPEN-001-CV5-EJP – Diversions
• ED2-NLR(A)SPEN-004-ENV-EJP – Early Replacement of High Loss Assets to Reduce Network Losses
• ED2-NLR(A)SPEN-003-SWG-EJP - EHV Switchgear
• ED2-NLR(A)SPEN-001-RES-EJP – EHV Overhead Line Modernisation
• ED2-NLR(A)SPEN-001-UG-EJP – EHV Underground Cable Modernisation
• ED2-NLR(A)SPEN-001-RES-EJP – Electricity System Restoration (ESR)
• ED2-LRE-SPEN-001-CV1-EJP – Enhanced Voltage Control
• ED2-NLR(A)SPEN-001-ENV-EJP – Environment - Noise Pollution
• ED2-NLR(A)SPEN-002-ENV-EJP - Environmental - Oil Pollution CV22
• ED2-LRE-SPEN-001-CV3-EJP – Fault Level Monitoring and Management
• ED2-NLR(O)SPEN-001-SMS-EJP - FieldOnline
• ED2-NLR(A)SPEN-003-SAF-EJP - Fire Protection CV14
• ED2-NLR(A)SPEN-003-RES-EJP - Flood Resilience CV16
• ED2-LRE-SPEN-002-CV1-EJP – Flexibility Services for High Utilisation Groups
• ED2-LRE-SPM-012-CV1-EJP – Formby-Southport 33kV Reinforcement
• ED2-NLR(A)SPM-003-SWG-EJP Frodsham 132kV Switchgear Modernisation
• ED2-NLR(A)SPM-001-SUB-EJP Gateacre 132kV Switchgear and Grid Transformer Modernisation
• ED2-LRE-SPD-026-CV1-EJP – Govan-St. Andrews Cross 6.6kV Upgrade
• ED2-NLR(A)SPM-005-SWG-EJP – Halewood 132kV Switchgear Modernisation
• ED2-LRE-SPD-002-CV1-EJP – Hamilton Primary Reinforcement
• ED2-NLR(A)SPM-007-TX-EJP – Hawarden 132kV Grid Transformers Modernisation
• ED2-NLR(O)SPEN-002-SMS-EJP – Historian Analytics
• ED2-LRE-SPEN-002-CV2-EJP – HV and LV Network Reinforcement
• ED2-NLR(A)SPEN-002-UG-EJP – HV Underground Cable Modernisaton
• ED2-NLR(A)SPM-006-TX-EJP – ICI Castner Kellner Grid Transformer T2B Replacement
• ED2-NLR-A-SPM-004-SWG-EJP ICI Wade 132kV Switchgear Modernisation
• ED2-NLR(A)SPM-010-TX-EJP – Ince Local 132kV Grid Transformers T1 & T2 Replacement
• ED2-LRE-SPD-014-CV1-EJP – Kaimes GPS Reinforcement
• ED2-NLR(A)SPM-009-TX-EJP – Kirkby 132kV Grid Transformer T3 Refurbishment
• ED2-LRE-SPD-018-CV1-EJP – Kirknewton Primary Reinforcement
• ED2-LRE-SPM-030-CV1-EJP – Legacy 132kV Reinforcement
• ED2-NLR(A)SPEN-001-SAF-EJP - Legal and Safety CV14
• ED2-LRE-SPD-011-CV3-EJP – Leven Primary Fault Level Mitigation
• ED2-LRE-SPD-001-CV1-EJP – Levenbank Primary Reinforcement
• ED2-NLR(A)SPEN-001-PROT-EJP - Light Current Protection and Pilots
• ED2-LRE-SPM-003-CV1-EJP – Lister Drive 132kV Reinforcement
• ED2-NLR(A)SPM-007-SWG-EJP Lister Drive 132kV Switchgear Modernisation - Circuit Transfers
• ED2-NLR(A)SPM-004-TX-EJP Lostock 132kV Grid Transformer T2 Replacement
• ED2-NLR(A)SPEN-002-OHL-EJP – LV & HV OHL Modernisation
• ED2-NLR(O)SPEN-001-MON-EJP – LV Network Monitoring
• ED2-NLR(A)SPEN-001-SWG-EJP – LV Switchgear Outdoor
• ED2-NLR(A)SPEN-003-UG-EJP – LV Underground Cable Modernisation
• ED2-LRE-SPM-005-CV1-EJP – Maentwrog – Porthmadog 33kV Reinforcement
• ED2-NLR(A)SPEN-003-ENV-EJP – Management of POPs – Polychlorinated Biphenyls (PCBs)
• ED2-LRE-SPM-027-CV1-EJP – Middlewich Primary Reinforcement
• ED2-LRE-SPD-010-CV1-EJP – Monktonhall-Tranent Primary Reinforcement
• ED2-NLR(O)SPEN-003-SMS-EJP – NAVI & INM
• ED2-NLR(A)SPD-001-UG-EJP - Nethertown Underground Cables
• ED2-LRE-SPD-020-CV3-EJP – New Lesmahagow GSP
• ED2-LRE-SPD-021-CV1-EJP – New Moffat GSP
• ED2-LRE-SPEN-001-CV4-EJP – New Transmission Capacity Charges
• ED2-LRE-SPM-010-CV1-EJP – Newtown-Morda 33kV Reinforcement
• ED2-NLR(A)SPEN-004-RES-EJP - OHL Clearances
• ED2-LRE-SPD-022-CV3-EJP – Portobello Primary Substation Fault Level Mitigation
• ED2-LRE-SPM-010-CV3-EJP – Prescot Grid 33kV Fault Level Mitigation
• ED2-NLR(O)SPEN-001-PQM-EJP – Primary PQM Modernisation
• ED2-NLR(O)SPEN-001-RTU-EJP – Primary RTU Replacement
• ED2-NLR(A)SPEN-002-SWG-EJP – Primary Switchgear
• ED2-NLR(A)SPEN-001-TX-EJP – Primary Transformer Modernisation
• ED2-NLR(A)SPEN-001-QOS-EJP – Quality of Supply Investment
• ED2-LRE-SPM-015-CV1-EJP – Radway Green 33kV Reinforcement
• ED2-NLR(A)SPM-001-CIV-EJP – Rainhill and Frodsham 132kV Grid Building Refurbishment
• ED2-LRE-SPD-022-CV1-EJP – Redhouse GSP Reinforcement
• ED2-LRE-SPEN-001-CV2-EJP – Reinforcement of LV Services
• ED2-LRE-SPD-028-CV1-EJP – Reinforcement of Single Transformer Primary Sites
• ED2-NLR(A)SPEN-002-TX-EJP – RIIO-ED2 HV Underground Transformers
• ED2-NLR(A)SPEN-005-RES-EJP - Rising Lateral Mains
• ED2-NLR(A)SPM-008-TX-EJP Rock Ferry 132kV Grid Transformers Modernisation
• ED2-NLR(O)SPEN-003-RTS-EJP – RTS Advanced Network Tools
• ED2-NLR(O)SPEN-005-RTS-EJP – RTS Control System Training Simulator
• ED2-NLR(O)SPEN-001-RTS-EJP – RTS Core System Hardware and Application Updates
• ED2-NLR(O)SPEN-006-RTS-EJP – RTS INM Integration and Data Rationalisation
• ED2-NLR(O)SPEN-002-RTS-EJP - RTS Mobile
• ED2-NLR(O)SPEN-004-RTS-EJP – RTS Network Optimisation
• ED2-NLR(A)SPM-006-SWG-EJP – RVS 300 SF6 132kV Switching Isolator Modernisation
• ED2-LRE-SPM-009-CV1-EJP – Sandbach Primary Reinforcement
• ED2-NLR(O)SPEN-001-NCP-EJP - Secondary Control Equipment Modernisation
• ED2-NLR(A)SPEN-001-SWGTX-EJP – Secondary Substation
• ED2-NLR(A)SPEN-001-CUT-EJP – Service Termination Modernisation
• ED2-NLR(A)SPEN-002-SWG-EJP – SF6 Primary (11/6.6kV) Switchgear Refurbishment
• ED2-NLR(A)SPEN-002-SAF-EJP - Site Security CV14
• ED2-NLR(O)SPEN-004-SMS-EJP – Smart Data Integration Fabric (SDIF)/a>
• ED2-NLR(O)SPEN-001-WSC-EJP – SPEN Worst Served Customers
• ED2-NLR(O)SPEN-002-TEL-EJP – SPD & SPM Secondary Communications
• NLR(O)SPD-001-TEL-EJP - SPD 33kV Telecoms Network Resilience Improvements
• ED2-NLR(O)SPEN-001-TEL-EJP – SPD & SPM Telecommunications Network Operation & Maintenance
• ED2-NLR(A)SPM-001-SWG-EJP Trawsfynydd 132kV Switchgear Modernisation
• ED2-NLR(O)SPEN-006-TEL-EJP – SPD/SPM Pilot Cabling Repairs
• ED2-LRE-SPM-007-CV3-EJP – SPM 11kV Network Group Fault Level Mitigation
• ED2-NLR(O)SPM-001-TEL-EJP – SPM 33kV &132kV Telecommunication Improvements
• ED2-LRE-SPM-011-CV3-EJP – SPM 33kV RMUs Fault Level Mitigation
• ED2-LRE-SPM-008-CV3-EJP – SPM 6.6kV Network Groups Fault Level Mitigation
• ED2-LRE-SPD-012-CV1-EJP – St Andrews Primary Reinforcement
• ED2-LRE-SPD-017-CV1-EJP – Stonehouse Primary Reinforcement
• ED2-LRE-SPD-024-CV1-EJP – Stranraer Primary Reinforcement
• ED2-NLR(O)SPEN-001-ENV-EJP - Visual Amenity
• ED2-NLR(A)SPM-002-SAF-EJP - Weaver Sluices
• ED2-LRE-SPD-003-CV3-EJP – West George Street Primary Fault Level Mitigation
• ED2-LRE-SPM-016-CV1-EJP – Weston - Basford Sidings 33kV Reinforcement
• ED2-LRE-SPD-015-CV3-EJP – Whitehouse GSP Fault Level Mitigation
• ED2-LRE-SPD-009-CV3-EJP – Whitlawburn Primary Fault Level Mitigation
• ED2-NLR(A)SPM-005-TX-EJP – Woodside 132kV Grid Transformer T2 Replacement
• ED2-LRE-SPM-004-CV3-EJP – Woodside Grid 33kV Fault Level Mitigation
• ED2-NLR(A)SPM-002-SWG-EJP Wylfa 132kV Switchgear Modernisation
• ED2-LRE-SPD-027-CV1-EJP – Yair Bridge 22kV Upgrade
• ED2-NLR(A)SPM-006-OHL – YS Route 132kV Overhead Line Modernisation

Annex 4A.24: Investment Approval Process and Governance

An overview of the SP Energy Networks investment decision making and approval process, highlighting the rigorous internal governance framework implemented throughout the entire lifecycle of a discrete project or programme of works. Please note this annex has not been published due to the level of commercially sensitive information it contains.

Annex 4A.25: SP Manweb Company Specific Factors

This annex sets out the background, benefits and incremental costs associated with the uniquely interconnected SP Manweb network. It details the Company Specific Factors adjustment which applies to SP Manweb for RIIO-ED2. Please note this annex has been redacted as it contains commercially sensitive information.

• View Annex 4A.25: SP Manweb Company Specific Factors

Annex 4A.26: Achieving a step change in Whole System solutions and outcomes

The purpose of this annex is to set out our ambition to achieve a step change in Whole System solutions and outcomes. Please note this annex has been redacted due to commercially sensitive information and compliance with GDPR requirements.

• View Annex 4A.26: Achieving a step change in Whole System solutions and outcomes

Annex 4A.27: Strategic DNO

This annex contains a number of proposals for SP Energy Networks to act as a ‘Strategic DNO’ in RIIO-ED2; working at a local level to enable the decarbonisation of heat and transport by utilising the extensive engineering, network and local knowledge that we have as a DNO.

• View Annex 4A.27: Strategic DNO

Annex 4A.28: Connections Strategy

This strategy contains our initiatives and commitments for our connections stakeholders in RIIO-ED2.

• View Annex 4A.28: Connections Strategy

Annex 4A.29: OT Cyber Resilience Plan

This annex details how SP Energy Networks will improve maturity of the Cyber Resilience of the OT Systems. All cyber security information is restricted in line with Ofgem’s guidance.