Two Tornado GR4 jets used bombs to destroy an armed vehicle and a stockpile of home-made explosives yesterday, the UK Ministry of Defence (MoD) said.
Reaper drones also carried out strikes targeting a "large group of terrorists" at a weapons cache, officials said.
The strikes come as Cameron said he believed the UK should join France and other nations in bombing the IS in Syria too.
In the latest update on the campaign in Iraq, the MoD said: "RAF aircraft flying as part of the coalition campaign against Isil [IS] have maintained intensive armed reconnaissance missions, striking a number of terrorist targets in the last few days."
The RAF's fleet of drones has also been involved in surveillance and reconnaissance missions over Syria, but it is not currently carrying out strikes there.