As corporate members of The Association of British Investigators, being accredited by The Law Society is very important.

ABI is an endorsed partner of the Law Society. ABI has both national and international membership and offers easy access to their trusted investigative professionals through their website.
“Widely regarded as the leading professional body for private investigators working in the UK and beyond, we recommend the Association of British Investigators (ABI) to our members”. (Law Society)
https://www.lawsociety.org.uk/support-services/membership-extra/business-services/abi/