Boris Johnson will face a Commons vote on whether claims that he misled MPs over partygate should be investigated.
Speaker Sir Lindsay Hoyle granted a request from opposition MPs for a vote which will be held on Thursday.
It comes as the PM prepares to face Parliament for the first time since he was fined last week for attending a gathering to mark his birthday in June 2020, in breach of his own government’s social distancing rules.
The debate will centre on the question of whether Mr Johnson misled MPs when he initially said, after claims about parties in Downing Street first surfaced, that no rules were broken.