REG - Costain Group PLC - Costain Secures £1bn Programme With Sellafield

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RNS Number : 0043D  Costain Group PLC  13 October 2025

 

 

Costain Group PLC

13 October 2025

 

Costain Secures £1bn Long-Term Programme With Sellafield

 

 

Costain Group PLC ("Costain") today announces that it has been selected by
Sellafield Ltd ("Sellafield") as its Utilities Delivery Partner, a major part
of Sellafield's Infrastructure Delivery Partnership ("IDP"). As Utilities
Delivery Partner, Costain will refurbish and replace a variety of on-site and
off-site utility distribution systems and services to enable Sellafield's
decommissioning programme. The contract is expected to be worth up to £1bn to
Costain and consists of an initial term of nine years with an option to extend
by a further six years, either in a single extension or multiple smaller
extensions. The total value of Sellafield's IDP is worth up to £2.9bn.

 

Alex Vaughan, chief executive officer of Costain, commented: "This new
contract award with Sellafield, with whom we have been working with since
2005, is testament to our strategy of developing long-term relationships with
tier 1 customers, building strong and collaborative partnerships, broadening
our service offering, and maintaining consistency and continuity of workflows.

"This long-term award follows previous contract wins in the civil nuclear
energy market this year with Sizewell C and Urenco and further demonstrates
our integral position in this market. The Government is clear that the safe
and responsible decommissioning of the UK's nuclear legacy is a critical part
of creating a sustainable future and delivering local and national economic
prosperity. As one of Sellafield's trusted partners we will deliver safe,
high-quality utilities upgrades in a complex working environment."

Enquiries

 

 

 Investors and analysts      matt.jones@costain.com

 Matt Jones, Costain         +44 (0) 7860 922341
 Financial media - Headland  costain@headlandconsultancy.com
 Andy Rivett-Carnac          +44 (0) 7968 997 365

 Charlie Twigg               +44 (0) 7946 494 568 (tel:+44%20(0)79%204649%204568)

 

Notes to editors

 

Costain improves people's lives by creating connected, sustainable
infrastructure that enables people and the planet to thrive. Through the
delivery of predictable, best-in-class solutions across the transport, water,
energy and defence markets, we are creating a sustainable future and securing
a more prosperous, resilient and decarbonised UK.

 

By bringing together our unique mix of construction, consultancy, engineering
and digital services, we work strategically with our customers and suppliers
to meet critical national needs. Together, our people transform the
performance of the infrastructure that connects, protects and powers people's
lives.

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