You can contact a ceramic supply business. Potters use borax to make some of the glazes .
In your local market, check in the laundry isle. It is an additive to use with your laundry detergent. The real name is 20 Mule Team Borax. Hope this helps.
Tesco Naturally range sells it in their laundry area as a stain remover. 400g for 99p.
Check out this site: www.borax.com
click on borax vistors center, and then on worldwide locations----or you can just contact them----maybe they use a different name in the UK.
Where do I buy this, at the hardware shop or supermarket?
I'm sure there are chemical supply companies and pool chemical companies in the UK. Look by the chemical name which if I remember correctly is sodium borate. Many chemicals can be purchased in bulk. It should be as easy as doing a google search or making a few phone calls to find somewhere that has it.
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