Scotland’s electricity transmission network operator has successfully raised £640 million through a landmark green bond issuance to fund critical upgrades that will transform the nation’s energy infrastructure and support the UK’s 2030 clean power ambitions.
SSEN Transmission, the 75%-owned subsidiary of SSE plc, completed the €750 million eight-year green bond on 25 August, marking its second venture into the Euro bond market. The bond, maturing in November 2033 with a fixed coupon of 3.375%, was swapped to Sterling for an all-in funding cost of 5.23%.
The successful issuance reinforces SSE’s position as the UK’s largest corporate green bond issuer, bringing the group’s total outstanding green bonds to £5.5 billion. Of this total, £2.7 billion has been issued directly by SSEN Transmission, highlighting the subsidiary’s growing financial independence in funding Scotland’s energy transition.
Barry O’Regan, SSE’s Chief Financial Officer, said: “SSE is at the heart of the clean energy transition, investing in high-quality assets across the Group. Our transmission business is growing rapidly and this bond offers yet another attractive proposition to investors looking to finance green infrastructure”.
Financing Scotland’s Energy Revolution
The bond proceeds will specifically support SSEN Transmission’s ambitious £22 billion investment programme to upgrade the transmission network across northern Scotland through 2031. This massive infrastructure overhaul represents one of the largest investment programmes in Scottish history and is designed to enable the north of Scotland transmission network to meet 20% of Great Britain’s clean power demand by 2030.
The investment programme forms part of SSEN Transmission’s “Pathway to 2030” strategy, which aims to connect new onshore and offshore wind farms while ensuring clean electricity can be transported from Scotland’s renewable energy hubs to demand centres across the UK. Economic analysis independently reviewed by BiGGAR Economics forecasts the full £22 billion programme could support up to 37,000 jobs across the UK, with 17,500 positions in Scotland and 8,400 in northern Scotland.
The funding comes as Scotland pursues aggressive renewable energy targets, including 20GW of onshore wind capacity by 2030 – requiring the deployment of one and a half times more capacity in eight years than was built in the previous two decades. The Scottish Government has also set offshore wind ambitions of 8-11GW by 2030.
Strategic Infrastructure Projects Drive Investment
A key component of the investment programme is the controversial Kintore-Tealing 400kV overhead line project, which SSEN Transmission confirmed last week it will submit for Scottish Government approval by 5 September. The project, following one of the largest public consultation exercises ever conducted in northern Scotland, will create a new transmission corridor between Aberdeenshire and Angus.
The infrastructure upgrades are critical for connecting Scotland’s renewable energy generation to the rest of the UK grid. Current projects will enable connections for major wind developments including the 443MW Viking wind farm, 228MW Stronelairg, and the 99MW Aberdeen Offshore wind farm.
SSEN Transmission’s regulatory filings show the company expects to invest around £22.3 billion during the RIIO-T3 price control period from April 2026 to March 2031, comprising £6 billion in baseline expenditure and £16 billion in strategic investments already approved by energy regulator Ofgem. An additional £9.4 billion in potential future projects could bring total investment to £31.7 billion.
Regulatory and Policy Framework
The infrastructure investment programme operates within the UK government’s Clean Power 2030 framework, which aims to achieve 95% low-carbon electricity by 2030. The government’s Clean Energy Industries Sector Plan, announced in June, targets doubling clean energy investment to over £30 billion annually by 2035.
Energy regulator Ofgem has committed £8.9 billion to power grid expansion, marking the first step in an estimated £80 billion investment programme to boost grid capacity and shelter households from energy price volatility. The funding will enable 80 transmission projects to be completed within five years, allowing up to 126GW of clean power generation to connect to the grid by 2030.
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Looking forward
SSEN Transmission’s successful bond issuance demonstrates the critical role of green finance in enabling the UK’s energy transition. With the company targeting zero electricity supply interruptions, 20% of GB clean power capacity, and transformational community benefits, the investment programme represents a blueprint for sustainable infrastructure development.
The project’s success will depend on timely regulatory approvals, continued investor confidence in green infrastructure, and the ability to navigate planning and delivery challenges that have historically plagued major UK infrastructure projects. As Scotland races toward its 2030 renewable energy targets, SSEN Transmission’s £640 million bond provides essential funding for what company executives describe as “mission-critical” infrastructure investments.
