A new Winnie-the-Pooh character has been unveiled to mark the 90th anniversary of the book's publication.

The new character Penguin was inspired by a photograph of AA Milne and his son with a toy penguin.

A new adventure, The Best Bear In All The World, is being published in October.

Penguin will feature in the sequel alongside the bear "of very little brain", Christopher Robin and friends, Piglet, Eeyore, Kanga, Roo and Tigger.

Author Brian Sibley penned Winter: In Which Penguin Arrives In The Forest, one of four seasonal stories to be featured in the yet-to-be published book.

He came up with the idea for Penguin from a photograph of Milne and his son Christopher (Robin) Milne playing on the nursery floor with the teddy bear which inspired the Winnie-the-Pooh character and a penguin toy.

"For someone who has loved Winnie-the-Pooh and co from his earliest childhood, the idea of visiting Hundred Acre Wood in search of a new story was wildly exciting," he said.

Sibley added: "The thought of Pooh encountering a penguin seemed no more outlandish than his meeting a kangaroo and a tiger in a Sussex wood, so I started thinking about what might have happened if, on a rather snowy day, Penguin had found his way to Pooh Corner."

Winnie-the-Pooh was an immediate success when it was first published in 1926 but the fictional bear first appeared as Christopher Robin's Teddy Bear in a 1923 poem in Punch.

It was recently named the UK's favourite children's book character and favourite children's book of the past 150 years.