Is that the same Grandma that introduced the 12 min nap

Actually, I shouldn't criticise - grandparents are a godsend, even if they do throw spanners in the works by doing things that you really really don't want them to do, at least they stop you throwing yourself off a cliff cos you never get a break!
Also, M can tell the difference between you and Granny - so as long as YOU are consistent with the WI/PD/WO strategy it will continue to be successful.
Yep, I am with Nic on the 1 nap thing. Let's go back to Strategy A (as opposed to B,C,D,E...!) and go with a 1 nap plan - ultimately that's where you want to be, you're going to have to transition at some point soon anyway, you'll only have to do all this rubbish once a day instead of twice so let's get it over and done with

Just had a read back over your thread (it's a v v useful diary actually!) and 11:30 nap / 5pm bedtime was what was working before she got poorly. The logic being that she shouldn't have more than 4.5hr A time between nap and bed.