Certainly! Here’s a list of leading national suppliers of heat-resistant iron in the United Kingdom in Markdown format:

```markdown

Leading Suppliers of Heat Resistant Iron in the UK

1. Aloft Imports Ltd

   • Specializes in various iron products, including heat-resistant options.
   • Website: aloftimports.com

2. Hollis & Co

   • Provides a range of metal products, including heat-resistant iron.
   • Website: hollis.co.uk

3. Triton Alloys Inc.

   • Supplies various alloys including heat-resistant iron for industrial applications.
   • Website: tritonalloys.com

4. Apex Trading Co.

   • Offers a range of metal products tailored for high-temperature applications.
   • Website: apextrading.co.uk

5. Birmingham Metal Exchange

   • A supplier of metallurgical products, including specialized heat-resistant materials.
   • Website: birminghammarbleexchange.com

6. Alloy Wire International

   • Focuses on the supply of heat-resistant alloys and specialty wires.
   • Website: alloywire.com

7. Eurosteel Ltd

   • Provides a range of steel and metal products, including heat-resistant grades.
   • Website: eurosteel.co.uk

8. Ferrobend

   • Known for high-performance iron products, including those for extreme temperatures.
   • Website: ferrobend.co.uk

9. Metallurgical Production Ltd

   • Supplies several heat-resistant alloy products for industry use.
   • Website: metallurgicalproduction.com

10. Special Metals Company

    • Offers a variety of heat-resistant alloys and iron products for various applications.
    • Website: specialmetals.com ```

Please verify these companies, as the rankings and offerings may change over time. If you need more detailed information about each supplier or specific products, feel free to ask!