Iraq crisis: UK 'will play role' in rescue mission, says PM

Britain will "play a role" in an international mission to rescue stranded Yazidi refugees in Iraq, Prime Minister David Cameron has said.

Speaking after chairing a meeting of the Cobra emergency committee on the crisis, he said "detailed plans" were being put in place for the operation.

The UK has made a third round of airdrops to the thousands fleeing Islamist fighters across mountains.

James Robbins reports.