As the days become colder and the nights shorter, the search for a deal to keep the heating on in Ukraine and safeguard the supplies of many of its neighbours is reaching a critical point.
Ukraine's Energy Challenge
BBC: Russia’s gas fight with Ukraine
People stand near a poster promoting an annual meeting of Russia's gas giant Gazprom in the headquarters of the world biggest gas company in Moscow, on June 27, 2014, with the logo of Gazprom in the background.
