Peregrin it's just a tiny regression, you'll see.
Having said that, I found that I always feel better when I just assume DS won't sleep well he never disappoints either rather than going to bed thinking he might sleep. Odd but true.
Sell your DD is still very small, so there's still hope!
Elph, loving the Halloween name. We are in a semi-rural area of Scotland with a very ahem "distinctive" local accent, so if DC pick it up they'll sound totally different from me (mid-atlantic accent) and DH (well spoken Scots).
Not doing anything until Ann shares her plan tonight, but we did discuss moving DS to his room already.
I just don't understand how that would work, because his nursery is next door to DD who ADORES going to bed these days and screams in glee and chuckles in the dark for 45ms before falling asleep 
We had a grade 4 plasterboard built in the dividing wall, but you can still hear everything and DS is the lightest sleeper in the world.
Those of you with multiples, how do you stop them waking their siblings? Or is there some weird evolutionary mechanism that means they sleep through the wailing?