Prime Minister David Cameron said he wants Britain to take a greater role in seeking to destroy the Islamic State (IS) extremist group in Syria.
"I want Britain to do more," Cameron told U.S. network NBC in an interview aired on July 19.
Cameron said, "we have to destroy this caliphate, whether it is in Iraq or in Syria."
Britain conducts regular strikes against IS militants in Iraq but has so far limited its Syrian involvement to flying surveillance missions to gather intelligence.
Cameron's cabinet has argued recently that lawmakers should also consider joining airstrikes.
Cameron failed to get parliamentary approval for military action against the forces of Syrian President Bashar al-Assad in 2013.
In a speech on July 20, Cameron will say Britain also needs to do more to confront the ideology of extremism by promoting British values such as democracy, freedom and the rule of law, the prime minister's office said.