So, Russia and Ukraine are still as far apart as ever, with the two warring countries unable to make a significant breakthrough in direct talks in Istanbul.

A key ally to Vladimir Putin has admitted Russia will only accept a complete victory over Ukraine in a major blow to the US’s efforts to end the war. US president Donald Trump has been trying to fulfil his election campaign promise to end the Ukraine conflict ever since he returned to office in January.

Dmitry Medvedev, deputy chairman of Russia's Security Council, described talks in Istanbul as "not for striking a compromise peace on someone else's delusional terms but for ensuring our swift victory".