Downing Street staff will be allowed to view Sue Gray's Partygate notes about them before they respond to the police.
Scotland Yard has sent formal questionnaires to more than 50 staff regarding lockdown-flouting gatherings in Downing Street and Whitehall during the pandemic.
It has now emerged that people under investigation - which includes Boris Johnson - will get limited access to their own interviews with Ms Gray's inquiry before they respond to the Metropolitan Police.