Multiple claims in the reported coverage say the UK government has been accused by a parliamentary intelligence watchdog of allegedly withholding or not properly sharing information related to files connected to Peter Mandelson. The reports state the watchdog alleges there has been a “cover-up” and raise concerns that the handling of the material may have put national security at risk. The criticism is directed at No.10/Keir Starmer’s administration, with the reporting portraying the dispute as worsening for the government. According to the summary provided, the watchdog’s position is that failures connected to the Mandelson matter were not addressed transparently, and that the process for producing or providing the relevant files did not meet the watchdog’s expectations. The coverage does not provide further verified details in the material supplied, including specific documents, formal findings, or what exact failures the watchdog cites beyond the alleged cover-up and national security concern. The allegations therefore center on transparency and information handling by the government in relation to Mandelson-related files, as described in the reported accounts.