What do Indiana Jones, St George and Brian the Snail from the Magic Roundabout have in common?
This year, the 50-year-old extreme charity fund-raiser planned to repeat the feat he is most famous for - walking the course wearing a 1940s deep-sea diving suit.
But marathon organisers have rejected his plans because a rule-change has meant competitors must complete the course within a day.
Here's my BBC News article.