David Cameron and Vladimir Putin will hold talks on the Syrian civil war in London tomorrow.
The British Prime Minister and Russian President will discuss the crisis during a bilateral summit in Downing Street.
Mr Cameron is likely to raise Russia's continual blocking of a United Nations Security Council resolution designed to increase the pressure on President Bashar Assad as he presses on with his brutal crackdown on pro-democracy fighters in a conflict which has led to at least 19,000 deaths.
Baroness Amos has told ITV News she is concerned that the situation in Aleppo may be a repeat of the attack on the Syrian city of Homs.
While thousands have fled Aleppo in recent days as violence escalates, those remaining face severe food shortages amid the fierce fighting.
This is a revolution reliant on bravery and bravado and often not much else. This is a brutal fight to the death.