Here is a list of leading national suppliers of kitchen appliance connection hoses in the United Kingdom:

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Leading National Suppliers of Kitchen Appliance Connection Hoses in the UK

1. B&Q

   • Website: www.diy.com

2. Screwfix

   • Website: www.screwfix.com

3. Wickes

   • Website: www.wickes.co.uk

4. Homebase

   • Website: www.homebase.co.uk

5. Robert Dyas

   • Website: www.robertdyas.co.uk

6. Plumbase

   • Website: www.plumbase.co.uk

7. Toolstation

   • Website: www.toolstation.com

8. Appliance Line

   • Website: www.applianceline.co.uk

9. Euroffice

   • Website: www.euroffice.co.uk

10. Dunelm

    • Website: www.dunelm.com ```

This list includes various suppliers ranging from DIY stores to specialty appliance retailers that may offer kitchen appliance connection hoses. If you need more information on each company or their specific product offerings, please let me know!