Hi there
Wanted to report back for anyone who might be vaguely curious about this situation.
In the 2-3 months before starting at nursery (beginning of January), Luka transitioned to 1 nap and started, incredibly, to have 1.5-2 hour, even 2.5 hour naps. I never felt I could rely on it, but it was the majority of the time. By Christmas, he started having trouble transitioning through 45 mins again and he had short naps for the two weeks before he started at nursery (very stressful - he doesn't like waking up too early).
I was also still dubious about him sleeping in a room with other babies. However, with my DP's (partner) help, I wrote a clear summary of how Luka goes to sleep (ie independently), the principles behind not leaving him to cry but also not rescuing him, explained our little nap routine, and how best to react if/when he stirs at 45 mins.
Well, he has been having 2 hour naps every single day there! They start to put all the babies down from around 12.30pm and he is one of the last, if not the last, to go in, when things are starting to settle down at around 1pm/1.15pm. He settles immediately and goes right to sleep! They are so impressed with his settling skills. I am proud of him, proud of myself for all the hard work I put in with BW methods/philosophies (esp PU/PD which absolutely 100% works) and also grateful to my DP for helping me write the "sleep summary" (he is a master of 'plain English').
So there you go, just one more example that the BW approach works and that it is possible to explain to others and get them to follow your principles. I will always be indebted to Tracy.
BTW I have been a mum for nearly 14 months and still have not met anyone in person who knows much about, let alone understands or even follows BW principles.
Nikki