It's hard to explain the motivation for running 26.2 miles.  It's even harder to justify why you want to travel 6000 miles to do it, but that's my personal challenge: running the 2015 Tokyo marathon. 

So the story is that I've completed five of the top six international marathons, collectively known as the 'Marathon Majors'. The streets of London, New York, Chicago, Berlin and Boston are behind me. Tokyo is the final chapter.

I want this event to make a real difference to Chestnut Tree House, a children's hospice in Sussex. I'd never really given much thought to what the term 'life-limiting condition' meant, but that all changed in 2011 when my son Michael was diagnosed with a rare degenerative condition.  

The Chestnut Tree House website tells you that they provide essential respite and end of life care to over 300 children and their families. I can tell you that the work that they do for these kids is nothing short of heroic and magical, but naturally you need a bit more than magic to run a hospice. That's where I really need your help.