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United Kingdom

Total projects
22
Under construction
0
Companies
18
Upcoming reg. events
1

Nuclear overview

United Kingdom has 22 SMR projects tracked on SMR Brief Pro, ranging from Planning to Approved.

Nuclear Readiness Score

7.3/10
Regulatory: 8Political: 7Grid: 7Public: 6Financing: 7Experience: 9

The UK possesses strong nuclear experience and a mature regulatory framework, positioning it well for SMR deployment. While political commitment is present, public acceptance and grid infrastructure require continued development to fully realize SMR potential.

Score updated Jun 22, 2026

Projects in United Kingdom

Urenco Capenhurst HALEU Facility
Urenco
Planning
0 MWe
Last Energy PWR-20 — England (Site Unconfirmed)
Last Energy
Planning
20 MWe
Westinghouse AP300 — Multiple European Sites
Westinghouse Electric Company
Planning
330 MWe
Elementl BWRX-300 — Multiple UK Sites
Elementl / GE Vernova Hitachi
Planning
300 MWe
SGE UK BWRX-300 Fleet — United Kingdom
SGE SMR UK (Synthos Green Energy)
Planning
4200 MWe
Cambridge Atomworks Odin Microreactor — UK
Cambridge Atomworks / Mott MacDonald
Planning
10 MWe
X-energy–Centrica — Hartlepool Xe-100 AMR Project
X-energy; Centrica; EDF
Planning
960 MWe
Core Power Floating Nuclear Power Plant — Liberty Programme
Core Power
Planning
0 MWe
Last Energy PWR-20 — Llynfi, South Wales (UK)
Last Energy
Planning
80 MWe
Newcleo UK — Justification Process with ONR
Newcleo
Planning
200 MWe
Rolls-Royce UK HTGR
Rolls-Royce, UKNNL, JAEA
Planning
25 MWe
TerraPower Natrium UK
TerraPower
Planning
600 MWe
Westinghouse eVinci Floating — CORE POWER Maritime
Westinghouse Electric Company / CORE POWER
Planning
5 MWe
BWRX-300 UK GDA Step 2 Completed — Regulatory Milestone
GE Vernova Hitachi Nuclear Energy / ONR / Environment Agency
Planning
300 MWe
Last Energy PWR-20 — DP World London Gateway Port UK
Last Energy / DP World
Planning
20 MWe
Holtec SMR-300 UK — EDF UK First SMR-300 Sites MOU
Holtec International / EDF (UK)
Planning
600 MWe
Community Nuclear Power — AP300 North Teesside (4 Units)
Community Nuclear Power / Westinghouse Electric Company
Planning
1200 MWe
Cottam SMR-300 Project
Holtec International; EDF
Planning
1200 MWe
Rolls-Royce SMR — Qatar Investment Authority Backed Programme
Rolls-Royce SMR / QIA / BNF Resources / Exelon Generation
Planning
470 MWe
Rolls-Royce SMR — UK Programme
Rolls-Royce SMR
Planning
470 MWe
Terrestrial Energy IMSR — Springfields Fuels Fuel Contract
Terrestrial Energy / Springfields Fuels (Westinghouse)
Planning
0 MWe
Rolls-Royce SMR — Wylfa, North Wales
Rolls-Royce SMR / Great British Energy–Nuclear
Approved
1410 MWe

Companies headquartered in United Kingdom

Arup
London, United Kingdom
PWR
Babcock International
London, United Kingdom
PWR
Cambridge Atomworks
Cambridge, United Kingdom
HTGR
Cavendish Nuclear
Warrington, United Kingdom
PWR
Centrica plc
Windsor, Berkshire, England
Diversified energy investor and offtaker with nuclear exposure spanning both large reactors and SMRs, rather than a reactor technology developer itself
Community Nuclear Power
London, United Kingdom
PWR
CORE POWER
London, United Kingdom
HTGR
Data Center Dynamics
London, United Kingdom
Multiple
Moltex Energy
London, UK / Fredericton, Canada
MSR
Mott MacDonald
Croydon, United Kingdom
PWR
New Civil Engineer
London, United Kingdom
PWR
Nuclear Engineering International (NEI Magazine)
London, United Kingdom
Multiple
Rolls-Royce SMR
Derby, England, UK
PWR
Sellafield Ltd
Seascale, Cumbria, United Kingdom
PWR
Springfields Fuels Ltd (Westinghouse)
Preston, Lancashire, United Kingdom
MSR
TerraPower UK Ltd
United Kingdom
Natrium
Urenco
London, United Kingdom
Uranium enrichment
World Nuclear Association
London, United Kingdom
Multiple

SMR Brief Pro members also see:

  • Regulatory Calendar for United Kingdom
  • Funding & Grants available in United Kingdom
  • Deals involving United Kingdom
  • Country Readiness Score

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