Nicko is so good on this album but I realized it the first time, during the second(!) listening session when Darkest Hour happened. The first album listening session was more focused on the melodies (guitar, bass, Bruce), riffs and solos.
Relaxed but secure playing and some mighty enjoyable rolls during Adrian's solo. Adrian's Darkest Hour solo is probably my favourite by him on this album, topping his work in The Writing on the Wall.
Also check what Nicko does with his cymbals in the beginning. These double crash cymbal hits work very well over that atmospheric, calm intro.
God bless Nicko. He makes our favourite band a real band with real human presence in the music. Wonderfully produced.