The film Defiance dramatised the story of the Bielski Otriad (Brigade), the partisans led by four Jewish brothers who resisted the Nazis in occupied Poland. Now their heroism has inspired a different work — a “jazztronica” composition, The Bielski Suite, from London guitarist, Alex Roth.

He and brothers Nick (saxophone) and Simon (drums) are trying to raise £4,000 to take the piece on tour, using sponsume, a crowd-funding website which offers donors rewards such as concert tickets or EPs.

They have called their band Otriad.