The Department for Transport (DfT) has delayed the release of the Greenaway report into uninsured driving stating that it was trying to find a "convenient time for all parties concerned".
But industry sources said the cancellation of this week's release was due to fears the report would clash with the Butler Inquiry and the Government Spending Review.
A spokesman for the DfT said: "The report will be published some time this summer."
Professor Greenaway's report is widely expected to recommend harsher punishment for uninsured drivers and more effective detection of offenders.
A spokesman for the ABI said: "We are disappointed with the delay because we believe the report needs to published as soon as possible."