Ice, a two part TV movie from 2011.
This insightful drama tackles nasty big businesses, climate change and immigration policy with disastrous results. Not only did global warming become the dawning of a new ice age in the space of a day, putting northern Europe under 30 feet of snow and ice when only yesterday it had an equatorial climate... but the inexpensive stand-in for Kenneth Brannagh survives murder attempts, sinking drilling rigs, plane crashes, armed gangs, freezing cold, collapsing glaciers and gawd knows what else to reach his stricken family in London... which amazingly, he does. The dialogue was bloody awful too. My only hope is that climate change destroys humanity before another clanger like this is made.