It's the equivalent of Birmingham to London with Mount Everest in the middle and I have to run it in less than 46 hours. Just over 100 miles through the Alps carrying a pack 10km of ascent (not 10km of uphill - uphill to a height of 10km), non-stop, sleep-deprivation, altitude sickness, etc. etc. etc. yada yada.

This one could well be the beating of me.

I'm doing it for Sir Bobby Robson's Foundation which raises money to detect and treat cancer.

I know there's a recession on and you all gave very generously when I went to the desert. But go on, give us a few quid.