If your train is 4 hours late due to monstrous rail incident....it will be on the news. Send your ticket (showing you took that train route) with a letter to the organisers asking for a 'deferral' to next year.
The emergency number on the day would be too busy for you to have a good chance of getting through
OK....is that reassuring enough, or do you want a fluffy blanket and some hot chocolate to help you sleep well?
Take care....I'm well impressed by all you marathoners.
