TOM BALMFORTH and DAN PELESCHUK UKRAINIANS will fight "for as long as we can" to hold the eastern city of Bakhmut, President Volodymyr Zelenskiy vowed on Friday, as he hosted European Union leaders to discuss further sanctions on Russia and Kyiv's EU prospects. Shortly after Zelenskiy spoke, air raid sirens sounded once again in Kyiv and across the country - a regular occurrence during months of Russian missile attacks on Ukraine's energy infrastructure far from the battlefields in the east and south - but there were no immediate reports of new air strikes. The head of the EU's executive Commission…