Today, Sarajevo on Friday marks the 20th anniversary of the start of the Bosnian war. 11,541 red chairs have been lined up in Sarajevo's main street. One for every man, woman and child killed.
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Other entries in the UKTV channel Gold competition included jokes about Donald Trump, Brexit, Southern Rail and Ryanair UKTV channel Gold.
Temperatures will remain close to freezing.
The prime minister's announcement came as international leaders gather in Paris on the second anniversary of the climate change plan.