I’m really struggling with DS (2 years 4 months) and bedtimes. He was an absolute star until recently and then started trying it on if you like but only very slightly - he’d ask for another book and then whimper / whinge a bit but be fine after some gentle talk about sleep being important and so on.
Just recently he’s been awful. His routine is watches Night Garden on CBeebies then bath, teeth, milk and stories. It’s been like this for months so he knows. But he runs away when Night Garden finishes and then has an absolute screaming tantrum, really wild and sobbing and frantic, when changed and put in bath. Eventually calms down and is fine in pyjamas and so on and we read five books. Then bed. Except the screaming tantrum has returned when I put him in bed 
I hate leaving him screaming but I honestly am not sure how else to deal with it. He does calm down eventually - put him to bed at 1940 and he’s chatting to himself now so not asleep but not wild either. But I just need some reassurance I’m doing the right thing and also if not how I should be dealing with it?