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Anglian Water’s @one Alliance

Anglian Water's Integrated Main Works Delivery Programme

Anglian Water’s @one Alliance is an integral part of the Anglian Water ecosystem, delivering complex projects across the Water and Water Recycling network.

Comprising 8 industry-leading organisations, each contributing specialised expertise, @one efficiently manages over 40% of Anglian Water’s capital delivery programme.

Our partners are Anglian Water Asset Delivery, Balfour Beatty, Barhale, Binnies, Mott MacDonald Bentley (MMB), Sweco, Skanska and MWH Treatment. Employees in the @one Alliance are employed across all our partner companies and work together to deliver complex programmes of work.

Following the successful delivery of £1.2bn during AMP7, the @one Alliance is now set to deliver approximately £3bn of vital work as part of Anglian Water’s £11bn AMP8 business plan, covering around 750 projects over the next five years.

Since our establishment in 2005, @one has grown to a team of over 1,600 employees. And with plans to welcome an additional 300-500 new team members over the next 12-18 months, the Alliance is set to expand even further. If this interests you, then take a look at our jobs page to see the options available to you!

A428 Black Cat Roundabout Mains Diversions (2025)

Implementation of a strategic and meticulously planned solution to divert eight water mains to enable the construction of a new dual carriageway

Anglian Water Phosphorus Removal Programme (2025)

Anglian Water’s £338m investment across 170 sites throughout AMP7 to mitigate the release of phosphates into the environment

Anglian Water Storm Tank Programme (2025)

Anglian Water’s £96m investment across 112 sites to increase capacity and manage stormwater surges during extreme weather events

Anglian Water's Strategic Pipeline Alliance: Little Whelnetham to Raydon Tee Pipeline (2025)

Water resource management plan to help combat the risk of shortages, boosting resilience and securing water supplies across the East of England

Bolnhurst Water Recycling Centre (2025)

Trialing an environmentally friendly algae-based treatment process to reduce phosphorus levels in the final effluent to below 0.5 mg/l

Cadney Reservoir (2025)

Repairs to cracks and joints at a key reservoir to restore structural stability by preventing water infiltration and reducing the risk of leaks or failures

Dereham WRC (2025)

Major upgrade to increase flow to full treatment and future-proof infrastructure to meet both regulatory standards and the evolving needs of customers

Duston Mill Pumping Station Intake (2025)

Complying with the Eels (England and Wales) Regulations 2009 at the raw water intake for Pitsford WTW

Flag Fen WRC (2025)

Providing an additional 8000m3 of stormwater storage and storm tank cleaning systems to meet the WINEP flow driver

Holywell Row Stormwater Storage (2025)

Five interconnected rows of Weholite pipe designed to capture stormwater before gradually release it back to a pumping station when conditions stabilise

Sprowston Blue Boar Lane Rising Main (2025)

Rehabilitation project addresses critical operational challenges while minimising environmental and community impacts

Towcester WRC (2025)

Addressing issues with storage capacity, flow capacity, phosphorus levels & growth requirements, to maintain the high standard that Anglian Water aspire to achieve

Broadholme WRC (2024)

£35m investment in improving phosphorus removal capabilities and increasing full flow to treatment in north Northamptonshire

Cotton Valley WRC (2024)

£17m investment project spanning multiple phases to address operational challenges & enhance treatment capacity to maintain regulatory compliance

Grays Sewer Rehabilitation (2024)

CIPP relining of 840m of large diameter pipe following a proactive CCTV survey that revealed hydrogen sulphide damage

Ise Valley Sewer Rehabilitation (2024)

Temporary overpumping solution facilitates CIPP re-lining using ultraviolet and water cure techniques

Sleaford WRC (2024)

Utilising micro-organisms to break down, digest and clean wastewater, this nature-based reed bed solution reduces the need for chemical dosing

Toplers Hill Water Tower (2024)

Refurbishment of a 90-year-old potable water storage tank in Bedfordshire without compromising water quality

Potters Way Sewer Rehabilitation (2023)

Potters Way, located in the Fengate area of Peterborough, is a recent housing development next to the A1139. The development was built on the grounds of the former Fengate Water Recycling Centre (WRC) which closed in 1988 following the construction of the Flag Fen WRC. In early December 2018, Anglian Water became aware of the […]

Wing WTW (2022)

Wing WTW is part of the Anglian Water network, located in the county of Rutland in the East Midlands. The treatment site originally opened in 1977 and was then expanded to include a granular activated carbon (GAC) system in 1989. Morcott WTW, which was commissioned in 2010, is adjacent to Wing with a combined area […]

Heigham WTW (2021)

Heigham Water Treatment Works (WTW) has supplied clean water to the City of Norwich for more than 100 years. The treatment works supplied an average 42 Ml/d of water into the Norwich Public Water Supply Zone serving a population in excess of 200,000. The £36m scheme was the largest capital investment project within Anglian Water’s […]

Ludham Licence Reinvestment (2021)

Ludham WTW supplied 2.1 million litres a day (MLD) of treated water to 2,464 properties in Ludham and Martham whilst originally being fed by Ludham boreholes, with emergency supply coming from East Ruston boreholes. This £7.6m scheme addressed area growth and abstraction licence challenges by combining different schemes to deliver an efficient solution for customers […]

Whitlingham Water Recycling Centre (2021)

Investment in Whitlingham WRC was identified by Anglian Water to ensure that the site remains resilient for Norwich’s growing population and support the environment of the River Yare; part of the Norfolk Broads. A full review of the existing assets and support to carry out on-site testing to understand the process limitations, identified potential opportunities […]

Marston Water Recycling Centre (2020)

Marston Water Recycling Centre (WRC), near Grantham, serves a population of approximately 63,500 from Marston and the surrounding areas, with a capacity to treat up to 392 l/s of wastewater. The projected population growth in the area is approximately 76,000 until 2031, with the significant proportion of this growth estimated to occur by 2022. Following […]

Wetland Programme (Water Recycling)

Storm Programme (Water Recycling)

UMON Programme (Water Recycling)

Phosphorus Programme (Water Recycling)

Reservoir Programme (Water)

Nitrate Removal Programme (Water)

Pipeline Programme (Water)

National Infrastructure Programme (Water)

What we do:

Asset Maintenance & Rehabilitation

Flood Alleviation

Programme Management

Project Planning & Surveying

Reservoirs & Storage

Stormwater Storage

Wastewater Pumping Stations

Wastewater Treatment

Water Pumping Stations

Water Treatment