Here's a list of some leading suppliers of phenolic ball knobs in the United Kingdom:

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Leading National Suppliers of Phenolic Ball Knobs in the UK

1. Newey & Eyre (Part of Rexel UK)

   • Website: www.neweysonline.co.uk

2. Farnell element14

   • Website: www.farnell.com

3. McJunkin Red Man Corporation

   • Website: www.mjr.com

4. RS Components

   • Website: www.rs-online.com

5. AliExpress (Various Suppliers)

   • Website: www.aliexpress.com

6. Amazon UK (Various suppliers)

   • Website: www.amazon.co.uk

7. Accu Group

   • Website: www.accu.co.uk

8. The Cap Company

   • Website: www.capcompany.co.uk

9. Screwfix

   • Website: www.screwfix.com

10. Components Direct

    • Website: www.componentsdirect.com ```

Make sure to check each company's offerings, as product ranges and specialties can vary.