A rediscovered story by children's author Beatrix Potter is to be published for the first time in September.

The Tale of Kitty-in-Boots, written by the English children's author in 1914, was discovered by publisher Jo Hanks in the archive of London's Victoria and Albert museum.

She says the story, which will be illustrated by Quentin Blake, features many of Potter's best loved characters, including Peter Rabbit, Mr Tod, Mrs Tiggy-Winkle, Ribby and Tabitha Twitchit.