Robert Plant wrote 'Stairway to Heaven' in a bad mood by the fireplace at Headley Grange.

Robert Plant wrote ‘Stairway to Heaven’ in a bad mood by the fireplace at Headley Grange.

He described being in a very bad mood sitting there with pencil and paper, the words flowing in what felt like a moment of inspiration — from a gentle folk opening into one of rock’s most explosive finales.