Hundreds of British soldiers are to be sent to Iraq to help the fight against Islamic State, Sky News understands.
They will make up a training mission to assist the Iraqi Army and Kurdish Peshmerga.
The soldiers – expected to number a few hundred – will go to the region “within weeks” senior military sources have said.
The National Security Council is expected to rubber-stamp the mission when it meets on Tuesday.
Although small groups of British troops have conducted similar missions over the past few months, this will be much greater in size and on a more permanent basis.