Mott MacDonald to support BAM UK & Ireland as lead civil and structural designer on Eastern Green Link 3

Eastern Green Link 3 to strengthen renewable electricity transmission between Scotland and England

Mott MacDonald will support BAM UK & Ireland as lead civil and structural designer on Eastern Green Link 3 (EGL3), a nationally significant electricity infrastructure project that will help transform how renewable energy is transported across the UK.

EGL3 is a proposed 2GW high-voltage direct current (HVDC) transmission link between Peterhead in Aberdeenshire and Walpole in Norfolk, jointly developed by SSEN Transmission and National Grid Electricity Transmission.

Using subsea and underground cables, the link will transport renewable electricity generated in Scotland to areas of high demand across England, helping reduce pressure on the existing network and strengthening Britain's energy security. Once operational, EGL3 will be capable of carrying enough electricity to power around 2M homes.

The contract for BAM to deliver works at the southern converter station in Walpole follows an earlier appointment to deliver works at the northern converter station near Peterhead.

The appointment to support BAM with this work builds on Mott MacDonald’s existing work on EGL3 and EGL4, from early optioneering through front-end engineering design, as well as its previous design role with BAM on EGL2, providing continuity at a critical stage. Mott MacDonald also brings extensive experience of HVDC and converter station projects across the UK and a shared understanding with BAM of the technical and delivery challenges involved.

Mott MacDonald managing director of energy for UK & Europe Claudio Tassistro said: "Building on our established partnership with BAM and our involvement in the development of EGL3 to date, this appointment provides continuity at a critical stage of the project. Our teams bring a shared understanding of the technical and delivery challenges involved, alongside extensive experience of HVDC and converter station projects across the UK. Together, we look forward to supporting National Grid in progressing the southern converter station design and helping deliver infrastructure that will connect more renewable energy to homes and businesses."

BAM UK & Ireland executive director Huw Jones said: “We're not just building energy infrastructure. We're building the connections that will power Britain's future. With BAM appointed to civil engineering works at both ends of EGL3, alongside our work on EGL2, we're helping transform Britain's electricity network and turn the UK's clean energy ambitions into reality.”

We're not just building energy infrastructure. We're building the connections that will power Britain's future.

Eastern Green Link 3 project director Mark Brackley said: "Awarding this contract is an important step forward for EGL3 and the wider programme of network investment taking place across Great Britain. By increasing capacity between Scotland and England, EGL3 will help reduce constraints on the electricity network, allowing more renewable power to be transported from where it is generated to where it is needed. This will be vital to building a modern electricity network that can support economic growth and meet future demand. We look forward to working closely with BAM UK & Ireland and their partners as we move into the next phase of delivery."

The contract award forms part of The Great Grid Upgrade, National Grid's wider programme to upgrade and reinforce the electricity network. By increasing capacity between Scotland and England, EGL3 will help reduce network constraints, connect more low-carbon electricity and meet growing energy demand, while supporting long-term investment in UK skills and the supply chain.