PM attended a meeting with the leaders of the United States of America, France, Germany and Italy at the end of the NATO Summit in Warsaw.
A Downing Street spokesperson said:
The Prime Minister attended a Quint meeting with the leaders of the United States of America, France, Germany and Italy at the end of the NATO summit in Warsaw today.
They reviewed the progress made since leaders had last met in this format in Hanover in April, where the discussion had focussed on counter-terrorism, Syria, Iraq, migration and Russia/Ukraine.
They were joined by President Poroshenko for a discussion on the situation in Ukraine, with leaders agreeing on the importance of injecting fresh momentum into implementation of the Minsk Agreement.
Leaders also discussed Syria and Daesh, focussing on the need for all sides to abide by the Cessation of Hostilities to create the right conditions for peace negotiations to restart.