蜜芽传媒

Emma Jarvis will take to the 26.2 miles of the famous course dressed as a dog, and has a Guinness World Record in her sights!

The Worcestershire runner is raising money for the charity Guide Dogs, and is hoping to break the record for the fastest runner dressed as a mascot.

Tom Edwards reports from training on the riverside in Worcester, meeting Emma, and some of the bemused passers-by.