Britain is considering providing arms and training to Kurdish forces to help its fight against self-proclaimed Islamic State of Iraq and al-Sham (ISIS) insurgents, Prime Minister David Cameron said on Thursday.

Britain has so far carried out aid drops and surveillance and transported military supplies to Kurdish regional forces allied with the Baghdad central government.

Other European countries, including Germany, France and Italy have already agreed to send Kurdish forces a quantity of light weapons to use against the militants who have swept into northern Iraq.

"We're prepared to do more and we're considering actively whether to give them arms ourselves and whether we can more directly to train Kurdish militia, we're already playing a role there but we can do more," Cameron told ITV.