Hello, I read on a baby sleep site somewhere that lots of kids have iffy days with their nap around this age and you're best of treating it as a phase, and assuming they'll go back to napping again after a few days. Ie. keep putting them in their cot for an hours 'quiet time' even if they just chat and play with their teddies.
He might revert back in a few days and if not, you still get an hours break after lunch a little while longer!
Watching with interest as DS1 is 2.2 and has recently started really playing up and bedtime and taking ages to go to sleep. Am wondering if he is approaching not needing his nap anymore (dreading that day as am pregnant and knackered!).
I know what you mean about the routine though: all our days are built around having lunch and his nap at home (literally: 95% of the time we work our days so he can do this).
I think it will be kind of liberating actually, when he doesn't need a nap any more, so we can do things like go out for lunch again, and then a stroll round the shops!
FYI my friends little boy just stopped napping in his cot after lunch but will often catch a 15 minute cat nap in the buggy/car on the way home from wherever they've been in the afternoon around 4 ish. It doesn't seem to interfere with his bedtime.
Good luck - let me know what happens!