Well I managed the final run of week 2 yesterday. Feeling pretty good about it.
At the end I was still the same gasping, sweaty, pink blob but at least I managed to finish the week!
Some very positive benefits already. Aside from probably being able to run for a train now I've seen my heart rate after the last run drop to somewhat less alarming levels and I've also lost 1.2 kg since I started.
Roll on week 3 (he says sounding brave but a bit wary!).
(edited as I had the wrong week number - getting ahead of myself)