Noticed in the BBC London marathon coverage a British ex-para did the London marathon with an 18kg rucksac on (containing amongst other things a climbing rope...)in a nutty time of around 3h30.
Do we have the next Ueli Steck here?
The article made it sound like 18kg was the standard weight, or he had broken some kind of official record!
Amazing anyway.
http://www.bbc.co.uk/news/uk-england-sussex-22241284