A Downing Street spokesperson said:
The Prime Minister spoke to His Majesty the Sultan of Oman this evening and thanked him and his country for the incredible support they provided to help bring about the historic agreement with Iran on the nuclear programme this week. Both leaders welcomed the deal and agreed that this progress would lead to real stability, security and prosperity in the region.
They discussed how their 2 countries might work together further to reassure Gulf partners and His Majesty the Sultan of Oman welcomed the Prime Minister’s ongoing commitment to defence and security in the region.
Both expressed their concerns about getting humanitarian aid into southern Yemen and agreed to do more to help encourage groups within the country to come together and establish national unity.