VIRTUS Data Centres

Energy

Supporting low-carbon utility solutions in UK housing

Macquarie Asset Management is supporting a ‘last mile’ utility company expand its network and deliver low-carbon solutions to UK homes

Swipe for more
SectorEnergy
Sub-sectorUtilities
LocationUnited Kingdom

Opportunity

Across the UK, housing demand has steadily outpaced supply, leading to challenges such as rising costs and varying quality in many urban areas.

Since the 1980s, a reduction in social housing stock, limited new construction and increased demand driven by population growth, have contributed to the issue.1

To help address the shortfall, the UK Government has set an ambitious housebuilding target of 1.5 million new homes by 2029.2

Critical to delivering on this is the role of last mile utility infrastructure, which connects new housing and developments to essential services such as electricity, gas, water and wastewater, heating and cooling.

Providers of these connections are working to adapt to changes in the UK’s energy landscape, with a focus on decarbonisation and transitioning to sustainable energy solutions.


Approach

In 2024, Macquarie Asset Management (MAM) acquired a 50 per cent stake in Last Mile Infrastructure Group (Last Mile), which designs, builds, owns and manages ‘last mile’ utility connections and is one of the UK’s largest independent network owners.

Last Mile owns and manages approximately 910,000 connections, providing the vital link between distribution networks and end-customers for electricity, gas, heat, water and wastewater.

With its investment partner, MAM is supporting Last Mile’s plans to deliver an additional 730,000 contracted pipeline of multi-utility connections to meet growing demand for housing and businesses alike.3

Last Mile is also advancing decarbonisation efforts through innovative partnerships and solutions to help support the electrification of heating and transport throughout the UK – including heat networks and EV charging connections. One such partnership is Last Mile Heat, a joint venture between Last Mile and Rendesco, which provides ground and water source heat and cooling infrastructure to properties across the UK.

Last Mile Heat’s portfolio includes the UK’s largest low-carbon, water source heat network for a new mixed-use development of up to 6,000 homes in Hampshire, UK.

Outcome

In 2025, Last Mile and Rendesco delivered Phase 1 of the UK’s largest water-source low carbon heating and cooling network at the Welborne Garden Village development in Hampshire.4

The heat network uses a first-of-its-kind technology in the UK.5 This system draws water from Portsmouth Water’s Hoads Hill Reservoir and feeds it into an energy centre where a heat exchanger transfers energy from the water into an ambient heat network.

Heat pumps at each individual property within the network then convert that energy into low-carbon space heating, cooling and hot water, supplying approximately 700 homes, commercial properties, and community buildings.4

The network achieves 80 per cent lower emissions compared to traditional gas boilers and 54 per cent lower emissions than air-source heat pumps.4

As developers across the UK face ever stricter emissions targets, Welborne represents a blueprint for future projects. It exemplifies how Last Mile’s innovative model for multi-utility connections, management and financing can offer significant sustainability and cost benefits for developers and end customers alike.”

Liam Auer
Division Director, Macquarie Asset Management
& Shareholder Nominated Director, Last Mile Infrastructure

~910,000

electricity and gas connections across UK network

Connecting ~700

new properties to innovative water source heat network in Hampshire

80 per cent

lower carbon emissions delivered by ambient head networks compared to traditional gas boilers

  1. The Economic Impact of the Housing Sector, Centre for Economics and Business Research, National Housing Federation, March 2023.
  2. "Planning overhaul to reach 1.5 million new homes", UK Government, July 2023.
  3. Infracapital to form partnership with Macquarie Asset Management, Macquarie Newsroom, July 2023.
  4. As of September 2025, Welborne’s water-source low carbon heating and cooling network is the UK’s largest in terms of planned capacity to serve an entire community development, with provision for up to 6,000 homes. As of this date, 700 homes have been completed, with further phases underway.
  5. The Welborne water-source heat network is, to the best of our knowledge and based on information from Last Mile and Portsmouth Water (September 2025), the first publicly cited UK network to draw ambient heat from a potable water source for district heating.