Qatar was welcomed back in from the cold at a Gulf Co-operation Council (GCC) summit held in the Saudi Arabian city of Al-Ula.

The agreement to lift the three-and-a-half-year blockade by Saudi Arabia and its regional allies — the United Arab Emirates, Egypt and Bahrain — was hailed as major diplomatic triumph in the troubled region, although many observers have questioned what solutions to the cause of the rift have been achieved.