Here is a list of some leading national suppliers of gas turbine engine components in the United Kingdom:

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Leading Suppliers of Gas Turbine Engine Components in the UK

1. Rolls-Royce Holdings plc

   • A major player in aerospace and defense, known for developing high-performance gas turbine engines.

2. Safran Aircraft Engines

   • Involved in designing and making engine components, particularly for commercial and military aviation.

3. GE Aviation

   • A significant contributor to the aerospace engine market with advanced technologies in gas turbine engines.

4. Pratt & Whitney (a division of Raytheon Technologies)

   • Provides engines and components for both military and commercial aircraft.

5. MTU Aero Engines

   • Focuses on developing, manufacturing, and providing services for aircraft engines and components.

6. Doncasters Group

   • Supplies precision-engineered components for various industries, including aerospace and energy.

7. BMT Group

   • Offers engineering services and solutions, particularly in the aerospace sector, focusing on propulsion systems.

8. Goodrich (now part of Collins Aerospace)

   • Supplies components related to propulsion systems and has a strong presence in the aerospace sector.

9. Ultra Electronics

   • Provides advanced engineering solutions including components for gas turbine engines, particularly for military applications.

10. Leonardo UK

    • Engages in rotorcraft and aircraft engine components, notably in the defense sector. ```

This list includes companies involved in the design, manufacture, and supply of gas turbine engine components in the UK. Let me know if you need further details on any of these companies or the industry as a whole!