Theresa May is to face MPs’ questions about her decision to authorise air strikes against the Syrian government.
Opposition parties say MPs should have been consulted before the UK joined the US and France in bombing three Syrian sites, in response to a suspected chemical attack on the town of Douma.
Labour has called for the law to be changed for any future interventions.
Foreign Secretary Boris Johnson promised MPs would have “abundant time” to have their say.
Sites near Damascus and Homs were hit on Saturday in response to the alleged chemical attack on Douma on 7 April.
Both Syria, which denies any chemical use, and Russia, which provides military support to the Syrian government, have reacted angrily to the action.
UK prime ministers do not legally need to consult Parliament before launching military action, although they have done so since the 2003 invasion of Iraq.
Mrs May is due to give a Commons statement on Monday before facing questions from MPs.
She is also expected to ask the Speaker for permission to hold an emergency debate in Parliament on the issue of Syria.
He said with or without the vote it would be “largely symbolic” and would mainly just acknowledge that Parliament has had its say.
Her decision to authorise action without MPs’ backing has been criticised by Labour leader Jeremy Corbyn, who said she could “easily” have recalled Parliament or delayed her decision until MPs returned to Westminster from the Easter recess.
Mr Corbyn called for a new War Powers Act “so governments do get held accountable to Parliament for what they do in our name”.
The Scottish National Party said it would table a motion for an emergency debate to try to get MPs a vote on whether they backed the action.
Mr Corbyn, who has warned of an escalation in a “proxy war” between the US and Russia, said he would only consider backing intervention in Syria with the support of the United Nations.
It is thought President Bashar al-Assad’s regime had been stockpiling materials used to make chemical weapons there, it said.
The MoD added the facility was located “some distance” from “concentrations of civilian habitation”, and the risk of contamination to the surrounding area had been minimised.
The UK and US have said the strikes were successful, with President Trump warning the US is “locked and loaded” for further action if there are more chemical attacks.
On Saturday, the UN Security Council rejected a resolution drafted by Russia, while all Nato allies have given the military action their full support.