Topping the Eurovision leaderboard is a dream for many international music acts, but for Ukraine’s Kalush Orchestra the glitz of the song contest seems a long way off.

Operating out of western Ukraine, lead singer Oleh Psiuk has traded the stage to run a 20-strong volunteer group, supplying medicines and helping people flee the war. One of his band members is serving in the territorial defence unit.

On Monday, betting aggregate site Oddschecker declared the group firm favourites to win this year’s Eurovision Song Contest, but Psiuk is not ready to celebrate...