WoolSafe accreditation means that the product:
has been independently tested and approved for use on wool carpets and rugs, meets the highest standards of performance,
is both safe and effective,
is regularly monitored for compliance with the stands.
This is the Woolsafe statement from their site. What it does not tell you and it's " fatal flaw " is the fact that it costs several thousand pounds to gain their accreditation and there is an annual fee of several thousand pounds to remain on their list.
This allows large / high volume sellers of cleaning products to become accredited and remain on the list while lower volume producers, such as the suppliers of products to the " trade " That is Carpet Cleaners, can't afford to pay their large fees " just to be listed "
About 10 years ago I used a product for the purpose of advertising the Woolsafe aspect but the supplier quit the Woolsafe programme as he regarded it to be total rip off and felt his company could put the money saved to better use.