British Foreign Secretary Boris Johnson is in Saudi Arabia for the first in a series of meetings with Gulf leaders over the region's political crisis.
The Foreign Office says Johnson will meet in senior representatives of Qatar, Saudi Arabia, the United Arab Emirates and Kuwait.
He is meeting on Friday with Saudi Crown Prince Mohammed bin Salman and Sheikh Mohammed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi, and plans to travel to Qatar and Kuwait in the coming days.
Johnson is urging Gulf states go get behind Kuwait-led efforts to end tensions between Qatar and four Arab countries.
On June 5, Saudi Arabia, Egypt, the UAE, Bahrain and Yemen abruptly cut diplomatic ties with Qatar, accusing Doha of meddling in their domestic affairs and supporting terror groups. Mauritania followed suit shortly afterward, while Jordan downgraded its diplomatic representation in Doha.
Saudi Arabia also sealed its land border with Qatar, geographically isolating the tiny Gulf state.
Doha, for its part, strenuously denies that it supports terrorist groups, describing the moves to isolate it as "unjustified" and in breach of international law.
The Saudi-led anti-Qatar axis later issued a 10-day ultimatum to a 13-point list of demands.
Qatar denies supporting extremism and sees the ultimatum as an affront to its sovereignty.