Speaking before he hosted a meeting of 21 coalition members in London, Foreign Secretary Philip Hammond said the task of pushing IS back in Iraq would be slow and that Iraqi forces were getting better but were still some way off from being able to launch a major ground offensive.

“This isn’t going to be done in three months or six months. It’s going to take a year, two years to push ISIL (IS) back out of Iraq but we are doing the things that need to be done in order to turn the tide,” Hammond told Sky News.