Involving third parties in Competition Act investigations: OFT451

This publication was withdrawn on

This guidance is no longer applicable to CMA’s functions under the Competition Act 1998 (CA98). References to OFT451 in CMA guidance documents should now be disregarded.

Please see our Guidance on the CMA’s investigation procedures in Competition Act 1998 cases: CMA8 for information on our approach to dealing with third parties in CA98 investigations, and our guidance on how we handle information and complaints about businesses.

Explains the practice on consulting with complainants and other third parties during its investigations.