Complex sentence: It opens with a newsreel style documentary comparing life in Britain to life in Nazi Germany, narrated by E.V.H. Emmett in the jokey style common with such newsreels in Britain.
Split into simpler sentences: It opens with a newsreel style documentary comparing life in Britain to life in Nazi Germany. Narrated by E.V.H. Emmett in the jokey style common with such newsreels in Britain.