Here is a list of leading national suppliers of glass sieves in the United Kingdom:

```markdown

Leading National Suppliers of Glass Sieves in the United Kingdom

1. Thomas Scientific

   • Website: thomassci.com

2. Cole-Parmer

   • Website: coleparmer.co.uk

3. VWR (part of Avantor)

   • Website: uk.vwr.com

4. Fisher Scientific (part of Thermo Fisher Scientific)

   • Website: fishersci.co.uk

5. Merck Group

   • Website: merckgroup.com

6. SGS

   • Website: sgs.com

7. Laboratory Supplies Limited

   • Website: labsupplies.co.uk

8. Bürkert Fluid Control Systems

   • Website: burkert.com

9. Wheaton

   • Website: wheaton.com

10. Bandelin electronic

    • Website: bandelin.com ```

These companies offer a range of laboratory equipment, including glass sieves for various applications. Make sure to check their specific product catalogs for availability and specifications.