Claims the BBC withheld paperwork linked to Martin Bashir’s 1995 interview with Princess Diana are being probed by the Data Commissioner’s Workplace.
Its felony division is concerned within the investigation.
It follows a choose criticising the BBC for failing to launch a lot of emails referring to how Mr Bashir secured his interview.
Journalist Andy Webb had requested to see the emails that BBC managers despatched one another about Mr Bashir over a two-month interval in 2020.
The BBC disclosed a small quantity, nevertheless it has since emerged there have been greater than 3,000 emails.
Journalist Mr Bashir left the BBC in 2021 after it emerged he had secured the interview by way of deception.
Choose Brian Kennedy ordered the discharge of extra emails earlier this month.
The BBC stated: “Martin Bashir’s vital well being points prevented us from disclosing documentation in 2020, as we had been unable to seek the advice of him on the substantive points.”