What will Mr Grumpy think when there are delays on the Tube? Will Mr Tickle be able to keep his hands to himself on the bus?

These and other questions could well be answered in a new Mr Men book set in London.

Transport for London and Egmont Publishing have teamed up for the story featuring the much-loved children’s characters having an adventure in the Big Smoke.

Mr Men in London revolves around a tour of famous landmarks led by Mr Busy, including Trafalgar Square, Buckingham Palace, the Tower of London and London Transport Museum.

The characters will be shown using the capital’s transport network as they hop on and off buses and use London Underground to navigate their way around the city.

The book will be £2.99 and be available from June 4.

Merchandise will be released around the book and the transport museum's summer family programme will also feature themed events such as storytelling, creative workshops and a Mr Men and Little Miss trail.

Mr. Men and Little Miss is owned by Sanrio and was the fifth most popular children's book brand in 2014.