Six months ago, I foolishly signed up for the Royal Parks Half Marathon, thinking I’d be right as rain by October and not quite realising just how long it takes to regain full fitness after one surgery, six months of chemo and 33 rounds of radiotherapy. Add to that the effects of a scorching British summer, a month travelling around hot, sweaty Asia and a week of extreme jetlag and flu, and you can probably imagine I’m not doing very well with my training.