Britain hosts Libya's Sarraj for talks amid Tripoli crisis
Libyan Prime Minister Fayez al-Sarraj met Britain's Theresa May and Foreign Secretary Jeremy Hunt in London on Thursday, Downing Street said.
Sarraj, the head of Libya's internationally recognised government, has been in Europe this week seeking support against an attack on Tripoli by strongman Khalifa Haftar.
May's spokesman said: "The prime minister has joined a meeting between the foreign secretary and the prime minister of Libya in Downing Street."
No further details were immediately available of what was discussed.
Haftar's self-styled Libyan National Army (LNA) launched an assault on Tripoli on April 4, setting off another deadly escalation in a country mired in violence since the fall of dictator Muammar Gaddafi in 2011.
Britain has pushed for a resolution at the UN Security Council demanding a ceasefire in Libya but its efforts have foundered amid divisions at the world body.
French President Emmanuel Macron reiterated France's support for Libya's beleaguered Government of National Accord (GNA) after talks on Wednesday with al-Sarraj.
Tensions between Paris and the GNA had flared after Haftar began his offensive five weeks ago and Sarraj accused the French government of tacitly supporting Haftar's campaign.