http://www.ukhillwalking.com/news/item.php?id=60887
Brue Duncan the adventure racer did one of these "novelty events"
There's also the guy Simon a very occasional poster on here. He is the fella who BG trained in tower blocks. iirc he did something along similar lines. I was in touch with him and will try to dig out info on what he was doing. Coniston Water was involved - again iirc