Ladybird Books added that its parent company, the Penguin Random House children’s division, would also be implementing the changes. "Our commitment to avoiding gendered titles in the trade crosses all our imprints," they said.

So far seven publishers have backed the Let Books Be Books campaign - an offshoot of the Let Toys Be Toys drive - which is asking publishers to take the "Boys" and "Girls" labels off books and allow children to choose freely what kinds of stories and activity books interest them.

The list of supporters who have said they will not be releasing any new girl/boy labelled titles include Parragon, Chad Valley, Dorling Kindersley, Miles Kelly, and Paperchase.

Earlier this year, the campaign also won the support of Britain's largest specialist bookseller Waterstones, vowing that its stores will try to avoid separating out boys' and girls' fiction.

Publisher Ladybird drops gender-specific children's book titles