Newsagents have vowed to continue their fight for a full investigation of the newspaper and distribution market, despite the OFT's announcement last week that it would not refer the sector to the Competition Commission.

The National Federation of Newsagents, which made the request for a referral in 2006, said it would continue to call for a full market investigation "to maintain consumer access to a diverse and free press".

Trade relations manager David Daniel hit out at the OFT's decision to give the industry the chance to self-regulate before reviewing the market again in two years time. "In an industry that features mega-powerful multinational publishers and distributors, it does not take a genius to work out that toothless voluntary self-regulation is not likely to be the best solution."

The Association of News Retailing, meanwhile, said it would hold the OFT to its commitment to review the market in two years.

ANR MD John Lennon said it was unclear why the OFT had chosen to focus its investigation on copy allocation, cover prices and granting wholesalers exclusive distribution territories when retailers would argue that carriage charges were the most serious issue.

"It is clear that the OFT agree that those retailers who want to manage their own magazine supplies should be able to, and ANR will ensure publishers and wholesalers respond to these retailers' needs," he added.