On Thursday, ministers from 21 countries gathered in London to discuss the fight against the Islamic State.

Iraq’s Prime Minister Haidar al-Abadi was there, holding a press conference with US Secretary of State John Kerry and British Foreign Minister Philip Hammond.

Iraqi Kurdistan President Masoud Barzani was not. He was not invited, despite Kurdish peshmerga being in the front line of the battle with the jihadists.

On Friday, Barzani made his displeasure known on Twitter: