Private investigations by Wilsons Detectives Corporate Research by Detectives Wilsons Corporate Intelligence by Anthony Bryan Wilsons Group L L Partnership Credit Application & Order Form for Private - Commercial Investigations - Corporate Intelligence & Nominee Services. Wilsons Detectives & Consultancy Services was -first established in 1951 in Nairobi Kenya as K W R Wilsons -Security Services. There have only been small modification of the business trading names since 1951. Wilsons has Traded continuously since June 1951 and -without interruption and has the highest private company / LL Partnership credit rating AAA: An obligor rated 'AAA' has extremely strong capacity to meet its financial commitments. 'AAA' is the highest issuer -credit rating assigned