Five thousand people were the first to cross the finish line at the Olympic Stadium in the 5-mile National Lottery Olympic Park Run - the first public event at the east London stadium.
Men's winner was Tommy Davies, 26, of Loughborough while former model Nell McAndrew, 38, was the women's winner.
More top news
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.