A chapter cut from the final release of author Roald Dahl's beloved Charlie and the Chocolate Factory has been published today.

The excerpt, which is included in today's Guardian Review and is illustrated by Quentin Blake, features characters and settings that don't appear in the final version of the book. It also highlights some of the significant changes that were made to the book before it was published.

The children visiting the factory experience the 'Pounding and Cutting Room'. In an excerpt released online, the room is described vividly, with Dahl writing "in the centre of the room there was an actual mountain, a colossal jagged mountain as high as a five-storey building, and the whole thing was made of pale-brown, creamy, vanilla fudge".

The chapter also indicates that Charlie was originally meant to visit Willy Wonka's factory with his mother instead of his grandfather. It details characters who do not appear in the final work - including two children named Tommy Troutbeck and Wilbur Rice - and how they fell victim to the factory's surreal traps and punishments.

Charlie and the Chocolate Factory was first published in the US in 1964, and has inspired two film adaptations, as well as an opera and a musical. The late Roald Dahl also released a sequel in 1972 entitled Charlie and the Great Glass Elevator.