Well, seven weeks down, two to go and high time I actually posted instead of just chipping in to other people's messages.
It's gone pretty smoothly so far, with a hiccup after W6R2. I was fighting off a cold (due to the high pollen count, I think) for a while, but it then flared up to such an extent that I had to stop for a while.
There were several upsides. Firstly, how frustrated I was at not being able to continue. Definitely no secret feeling of relief at being able to skive off. More importantly, taking a week out also gave me chance to recover from the mounting little niggles. My knees were suffering (carrying too much ballast) but especially a pain between my shoulder blades due to bad posture. That had been improving once I read what the cause was, but it was still annoying.
By the time I got back to the programme, those things had more or less cleared up along with the cold. I started W6 again, finished it this time around and have now done W7 too.
The moral of the tale is not to be too disheartened if you're forced to take a week or so out. It slows your progress but might actually help in the greater scheme of things.
Thanks to everyone who, knowingly or unknowingly, has been such a great support in this. And especially to Laura (I use the podcast as the app isn't available outside the UK), whose tone is perfect -- always encouraging but never OTT.
This programme is genuinely one of the best things I've done in years.