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United Kingdom

Total projects
24
Under construction
0
Companies
17
Upcoming reg. events
2

Nuclear overview

United Kingdom has 24 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

Wylfa SMR Fleet
Great British Energy – Nuclear; Rolls-Royce SMR
Planning
1400 MWe
Westinghouse eVinci Floating — CORE POWER Maritime
Westinghouse Electric Company / CORE POWER
Planning
5 MWe
Last Energy PWR-20 — UK
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
Terrestrial Energy IMSR — Springfields Fuels Fuel Contract
Terrestrial Energy / Springfields Fuels (Westinghouse)
Planning
0 MWe
Last Energy PWR-20 — DP World London Gateway Port UK
Last Energy / DP World
Planning
20 MWe
Urenco Capenhurst HALEU Facility
Urenco
Planning
0 MWe
Cottam SMR-300 Project
Holtec International; EDF
Planning
1200 MWe
Rolls-Royce SMR — UK Programme
Rolls-Royce SMR
Planning
470 MWe
Cambridge Atomworks Odin Microreactor — UK
Cambridge Atomworks / Mott MacDonald
Planning
10 MWe
Rolls-Royce SMR — Qatar Investment Authority Backed Programme
Rolls-Royce SMR / QIA / BNF Resources / Exelon Generation
Planning
470 MWe
Core Power Floating Nuclear Power Plant
Core Power
Planning
0 MWe
Community Nuclear Power — AP300 North Teesside (4 Units)
Community Nuclear Power / Westinghouse Electric Company
Planning
1200 MWe
Newcleo UK — Justification Process with ONR
Newcleo
Planning
200 MWe
Wylfa Stage 2 Technical Partner Contract — £8.17 Billion Estimated
Rolls-Royce SMR / Great British Energy–Nuclear
Planning
1410 MWe
Last Energy PWR-20 — Llynfi Coal Station South Wales
Last Energy
Planning
80 MWe
BWRX-300 UK GDA Step 2 Completed — Regulatory Milestone
GE Vernova Hitachi Nuclear Energy / ONR / Environment Agency
Planning
300 MWe
Holtec SMR-300 UK — EDF UK First SMR-300 Sites MOU
Holtec International / EDF (UK)
Planning
600 MWe
Last Energy PWR-20 — South Wales Llynfi Site UK
Last Energy
Planning
80 MWe
Wylfa Foundation Engineering — Arup
Rolls-Royce SMR / Great British Energy–Nuclear / Arup
Approved
1410 MWe
Rolls-Royce SMR — Wylfa, North Wales
Rolls-Royce SMR / Great British Energy–Nuclear
Approved
1410 MWe
Rolls-Royce SMR — Nuclear Island Suppliers Appointed May 2026
Rolls-Royce SMR
Approved
1410 MWe
Rolls-Royce SMR — Wylfa Technical Partner Contract Stage 1
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
Community Nuclear Power
London, United Kingdom
PWR
CORE POWER
London, United Kingdom
HTGR
Data Center Dynamics
London, United Kingdom
Multiple
Elementl
London, United Kingdom
BWR
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
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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Track every SMR project in United Kingdom with SMR Brief Pro