World Book Day is a favourite event for thousands of schoolchildren, giving them the chance to get dressed up as their favourite characters and talk about their favourite books.

As part of the annual event, BBC Breakfast was given exclusive access to Cressida Cowell, author of the popular and best-selling series, How to Train Your Dragon.

Cressida gave Breakfast - and her fans - a special treat, with a sneak extract from her next - and last - book in the series, which is not due for release until September.