The stark figures from the Syrian conflict: over 250,000 dead and 12m displaced
The Syrian civil war, which was borne out of the Arab Spring of 2011, has resulted in hundreds of thousands of deaths, and created millions of refugees.
As world leaders face new calls to secure a multibillion-pound support package for Syrians, the Press Association analyses the conflict in numbers.
* 250,000 - the estimated number of deaths in Syria during the war as of August 17 2015, according to the latest United Nations Security Council estimate. However, other estimates varied between 150,000 and 350,000.
* 37,010 - foreign opposition fighters killed, as of mid-October 2015, according to the Syrian Observatory for Human Rights (SOHR).
* 12 million - people displaced since the conflict began, according to the UN - around half the Syrian population.
* 4 million - Syrians seeking refuge in neighbouring countries since the war started.
* 2014 - the bloodiest year in the Syrian conflict, with an estimated 76,021 deaths according to the SOHR.
* 12,517 - children killed during the war, according to opposition groups and SOHR, as of October 2015.
* 679 - medical workers killed in the Syrian civil war, as of September 2015, according to campaign group Physicians for Human Rights.
* 174 - majority in Parliament for Prime Minister David Cameron during a historic vote on December 2 for air strikes on Islamic State targets in Syria. There were 397 MPs in favour and 223 against.
* 42 - the percentage of Syria's national gross domestic product (a measure of a country's economic prosperity) spent on fighting the civil war, according to the Global Peace Index last year.
* 2 - British Typhoon fighter jets, deployed for the first time to defeat Islamic State in Syria and Iraq in December 2015, leaving from RAF Akrotiri in Cyprus.