Heather Hallett's demand for the unredacted documentation came after Johnson was embroiled in new drama about alleged breaches of his own government's Covid lockdowns, which police are now investigating.
The Cabinet Office stressed that its civil servants were legally bound to inform police of any apparent wrongdoing, but Johnson has condemned the handling of the allegations as"bizarre and unacceptable". "The entire contents of the specified documents are of potential relevance to the lines of investigation being pursued by the inquiry," she said in a statement.
But London's Metropolitan Police issued fines to dozens of aides after a criminal probe, and Johnson became the first serving UK prime minister found to have broken the law, over one of the gatherings.