The Taylor Nelson Sofres group originally acquired WHF in September 1999. At that time, the division was operating as the UK’s largest independent mystery shopping agency. TNS Mystery Shopping has now also become a leading supplier of video mystery shopping - the precise form of recorded measurement that shows every detail of a service delivery.

Commenting on the re-branding, Roy Findlay, managing director of TNS Mystery Shopping, said, "The change in name reflects our desire to become a global centre of excellence for mystery shopping – an expertise from which all Taylor Nelson Sofres clients can benefit. We are at the forefront of mystery shopping by providing innovative measurement, reporting and data delivery techniques. Increasingly, we are developing integrated service measurement solutions incorporating face-to-face, telephone, Internet, and postal mystery shopping techniques. Integrated solutions reflect the increasing number of channels through which staff and customers interact."